You scan the batch code on a Whole Melts package and a laboratory report appears.

Now what?

Seeing a lab report is one thing.

Understanding what the report actually says is another.

A Certificate of Analysis—commonly shortened to COA—can contain cannabinoid percentages, terpene measurements, batch numbers, laboratory details, pesticide screens, heavy-metal results, residual-solvent data and unfamiliar abbreviations such as ND, LOQ and LOD.

For someone who does not regularly read cannabis laboratory reports, several pages of numbers can look more confusing than useful.

This guide changes that.

We’ll explain:

What a Whole Melts COA is
How to match a report to a product
What THC and THCA numbers mean
How to read terpene results
What pesticide testing looks for
Why residual solvents matter
How heavy metals are evaluated
What microbial and mycotoxin tests mean
What “Pass,” “ND,” “LOD” and “LOQ” mean
What a COA cannot tell you
How lab reports help identify suspicious Whole Melts products

If you’re new to the brand itself, start with our Complete Guide to Whole Melt Extracts.

If your main concern is whether a product is authentic, read How to Tell if Whole Melts Are Real: 2026 Verification Guide.

This article focuses specifically on understanding the laboratory report behind the batch.

Adults 21+ only: This guide is provided for product-education purposes. Cannabis concentrates may contain high concentrations of THC, can cause impairment and are not risk-free. Cannabis laws and testing requirements vary by jurisdiction.

What Is a Whole Melts COA?

COA stands for:

Certificate of Analysis

A COA is a laboratory document reporting the results obtained when a sample is analyzed.

For cannabis products, that report may contain information concerning:

Cannabinoids
Terpenes
Pesticides
Residual solvents
Heavy metals
Microbial contaminants
Mycotoxins
Foreign material
Moisture or water activity
Other analyses required by the applicable jurisdiction

For example, California’s Department of Cannabis Control requires licensed testing laboratories to test regulated cannabis goods for cannabinoids, residual solvents and processing chemicals, pesticides, heavy metals, microbial impurities, mycotoxins, moisture/water activity and foreign material.

A COA also indicates whether a batch passes or fails the applicable testing requirements.

Whole Melts currently describes its products as carrying individual batch codes connected to third-party laboratory documentation.

You can read more about the brand’s approach on our About Whole Melt Extracts page.

Why Whole Melts Lab Results Matter

Cannabis concentrates cannot be accurately evaluated from appearance alone.

A concentrate may look:

Golden
Clear
Crystalline
Thick
Soft
Whipped
Wet
Dry

None of those characteristics independently tell you whether it passed a pesticide screen or how much THC it contains.

Consider:

Question	Appearance Can Tell You?	COA Can Help Answer?
Is it badder or crumble?	Yes	Sometimes
Exact THC concentration	No	Yes
THCA concentration	No	Yes
Terpene profile	No	Yes, when tested
Pesticide screening	No	Yes
Heavy-metal screening	No	Yes
Residual-solvent results	No	Yes
Batch identity	No	Yes
Testing laboratory	No	Yes
Testing date	No	Yes

This distinction is particularly important with products such as badder, sugar, shatter and crumble.

If you’re comparing those concentrate formats, see our Whole Melts Badder vs Sugar vs Shatter vs Crumble Guide.

Step 1: Check the Product Name

Start at the top of the report.

The product or sample name on the COA should correspond with the product you are examining.

For example, if the package identifies a particular concentrate or disposable, you should not be looking at a laboratory report for an unrelated product.

This sounds obvious, but it is one of the easiest inconsistencies to spot.

Be cautious when:

The COA names another product.
The strain or edition does not match.
A concentrate report is being used for a disposable.
A single generic report is presented for many unrelated products.

A legitimate-looking PDF is not useful if it belongs to something else.

Step 2: Match the Whole Melts Batch Number

This is one of the most important steps in the entire process.

The batch number on the package should match the batch information on the laboratory report.

Why?

Because laboratory testing applies to a specific production batch.

Two packages with the same product name can come from different manufacturing runs.

Those batches may differ slightly in:

THC concentration
THCA concentration
Terpene content
Color
Texture
Production date
Testing date

Therefore:

same strain name ≠ automatically same batch

and:

same packaging ≠ automatically same COA

Whole Melts currently emphasizes batch-level verification on its official website.

One COA Should Not Represent Everything Forever

Imagine a company produces a concentrate in January.

It is tested.

The company manufactures another batch in June.

Should January’s laboratory report automatically be used for the June batch?

No.

Batch testing works because the physical product can be connected with the actual sample analyzed.

A useful chain looks like:

product → batch code → laboratory sample → COA

When that chain breaks, the report becomes much less meaningful.

This is also why our Whole Melts Real vs Fake Verification Guide recommends checking the batch rather than relying simply on packaging.

Step 3: Identify the Testing Laboratory

A COA should clearly identify the laboratory responsible for the analysis.

Look for information such as:

Laboratory name
Address
Laboratory license information where applicable
Contact information
Report identifier
Sample identifier

Why does this matter?

Because “LAB TESTED” printed on packaging is not itself a laboratory result.

Likewise, a graphic containing:

99% PURE

TESTED

does not replace an identifiable analytical report.

The testing organization should be traceable.

Step 4: Check the Important Dates

Cannabis COAs may contain several dates.

These can include:

Date received

When the laboratory received the sample.

Date tested

When the analytical work took place.

Date completed

When testing was finished.

Date reported

When the final report was issued.

These dates should make sense relative to the product and batch.

A report created years before the purported product edition existed deserves additional scrutiny.

Dates are especially useful when investigating suspected counterfeit packaging.

For other authenticity checks, see:

How to Tell if Whole Melts Are Real.

Step 5: Understand the Cannabinoid Panel

The cannabinoid section is usually where people’s attention goes first.

Depending on the product and laboratory, you may see compounds including:

THCA
Delta-9 THC
CBD
CBDA
CBG
CBGA
CBC
CBN
THCV
Other cannabinoids

Different laboratories and jurisdictions may report different panels.

What Is THC?

Delta-9-tetrahydrocannabinol, commonly called THC, is the principal intoxicating cannabinoid associated with cannabis.

Concentrates can contain significantly higher concentrations of THC than conventional cannabis flower.

The CDC notes that concentrates used in vaping and dabbing can deliver highly concentrated THC.

Higher THC, however, should not automatically be interpreted as higher overall quality.

It tells you about cannabinoid concentration—not:

Pesticides
Heavy metals
Residual solvents
Authenticity
Terpene quality
Hardware quality
Storage condition

What Is THCA?

THCA, or tetrahydrocannabinolic acid, is a cannabinoid precursor found in cannabis.

Heat can convert THCA into THC through a process known as decarboxylation.

This is why laboratory reports may show separate values for:

THCA

and

Delta-9 THC

A raw concentrate can contain substantial amounts of THCA even when the measured Delta-9 THC percentage appears lower.

What Does “Total THC” Mean?

Some reports provide a calculated Total THC value.

This estimate accounts for the potential conversion of THCA into THC.

A commonly used calculation is approximately:

Total THC = Delta-9 THC + (THCA × 0.877)

Why multiply THCA by 0.877?

Because converting THCA to THC involves a change in molecular mass during decarboxylation.

The exact way results are presented can differ between laboratories and regulatory systems.

Do not assume:

THCA + THC = Total THC

without considering the reporting method.

Does Higher THC Mean Better Whole Melts?

No.

This deserves emphasis.

A concentrate showing a higher THC result is not automatically:

Purer
Better manufactured
More authentic
Better tasting
More terpene-rich
Free from contaminants

THC percentage is one measurement.

A meaningful quality evaluation examines the whole report.

If you’re comparing two different extract types, our Whole Melts Live Resin vs Live Rosin Guide explains why extraction method and cannabinoid percentage should not be confused with overall quality.

Step 6: Read the Terpene Profile

Terpenes are volatile aromatic compounds found throughout the plant kingdom, including cannabis.

A laboratory terpene panel may identify compounds such as:

Myrcene
Limonene
Beta-caryophyllene
Alpha-pinene
Beta-pinene
Linalool
Humulene
Terpinolene
Ocimene

Not every COA includes terpene analysis.

What Does a Terpene Test Tell You?

A terpene report can help describe the aromatic chemical profile of the laboratory sample.

For example, one batch could show more limonene while another contains more myrcene or caryophyllene.

However, a terpene result should not be interpreted as a guarantee that every person will perceive the product’s aroma or sensory characteristics identically.

Human perception varies.

The report measures compounds.

It does not measure your personal experience.

Why Terpenes Matter for Live Resin and Live Rosin

Terpenes become particularly relevant when comparing live resin and live rosin.

Both categories are often associated with attempts to preserve aromatic characteristics of the cannabis starting material, although the two products use different processing methods.

Live resin generally involves solvent-based extraction.

Live rosin generally uses mechanical separation followed by heat and pressure.

Our complete comparison is available here:

Whole Melts Live Resin vs Live Rosin.

Step 7: Check Residual-Solvent Results

Residual-solvent testing is particularly relevant to extracts produced using solvents during manufacturing.

Depending on the process and jurisdiction, laboratories may screen for substances such as:

Butane
Propane
Ethanol
Acetone
Heptane
Hexane
Other processing solvents

The applicable list varies.

A laboratory result may show:

Detected concentration
Reporting limit
Action level
Pass/fail status

Why Are Residual Solvents Important?

Extraction solvents are processing tools.

They are not supposed to remain in a finished regulated product above applicable limits.

This is one reason live resin and live rosin should not be treated as identical testing questions.

Live resin commonly involves solvent-based extraction.

Live rosin does not conventionally use those extraction solvents during pressing.

However:

Solventless does not mean testing is unnecessary.

A solventless product can still require evaluation for:

Pesticides
Heavy metals
Microbial contaminants
Mycotoxins
Foreign material
Cannabinoids

Read more about that distinction in our Live Resin vs Live Rosin Guide.

Step 8: Review Pesticide Testing

Cannabis plants can be exposed to agricultural chemicals during cultivation.

Regulated testing programs therefore commonly screen for specified pesticide residues.

A pesticide section may list numerous compounds separately.

Beside each one you might see:

ND
Detected
A measured concentration
Action limit
Pass/fail

The California Department of Cannabis Control, for example, requires pesticide screening for regulated cannabis products and sets action levels determining whether a batch passes.

Specific requirements can differ substantially between states and countries.

What Does a Pesticide “Pass” Mean?

A pass generally means that, under the applicable regulatory method and action limits, the laboratory result satisfied the requirement for that analyte or panel.

It does not mean:

“Scientists proved that absolutely zero molecules of every possible pesticide exist.”

Laboratory science works with:

Detection limits
Quantitation limits
Specified target analytes
Regulatory thresholds

Understanding that distinction helps prevent overinterpreting a laboratory report.

Step 9: Check Heavy-Metal Results

Cannabis products may also be screened for heavy metals.

Common regulated panels can include:

Lead
Cadmium
Arsenic
Mercury

Why test for them?

Heavy metals can potentially enter products through factors such as:

Soil
Water
Nutrients
Processing equipment
Packaging
Hardware

For vapor products, hardware can be another relevant consideration because the extract is stored in contact with device components.

A batch passing one analytical category does not automatically mean every other category was tested.

Always review the complete report.

Step 10: Review Microbial Testing

Microbial testing evaluates specified microorganisms or microbial contamination.

Depending on jurisdiction and product category, this may include organisms such as:

Certain bacterial species
Yeast
Mold
Other regulated microorganisms

Microbial requirements vary according to the legal market.

The important question is not simply:

“Does it say lab tested?”

Instead ask:

What microbial analyses were actually performed?

Step 11: Understand Mycotoxin Testing

Some molds can produce compounds known as mycotoxins.

Regulated cannabis testing programs may therefore screen for substances such as certain aflatoxins and ochratoxin A.

A visually attractive concentrate does not tell you whether a mycotoxin panel passed.

Again:

Appearance and analytical testing answer different questions.

Step 12: Look for Foreign-Material Testing

Foreign-material evaluation is another component of some regulated cannabis testing programs.

The aim is to identify unwanted material that should not be present in the product.

Testing requirements depend on jurisdiction and product type.

What Does “ND” Mean on a Whole Melts COA?

ND commonly means:

Not Detected

This does not necessarily mean mathematically absolute zero.

It generally means the analyte was not detected above the method’s applicable detection threshold.

That brings us to two other abbreviations.

What Does LOD Mean?

LOD means:

Limit of Detection

This is approximately the lowest level at which the analytical method can reliably detect that an analyte appears to be present.

Think of it as:

“Can the instrument tell that something is there?”

What Does LOQ Mean?

LOQ means:

Limit of Quantitation

This is approximately the lowest concentration at which the laboratory can reliably quantify an analyte under the validated method.

Think of it as:

“Can the instrument reliably tell us how much is there?”

LOD and LOQ are related but not identical.

ND Does Not Mean “Absolutely Zero”

Suppose a report says:

Pesticide X: ND

That usually means:

not detected above the applicable detection capability of the method.

It does not scientifically prove that literally no molecule exists anywhere in the sample.

This distinction is normal in analytical chemistry.

What Does “Pass” Mean?

When a laboratory report shows:

PASS

it generally means the tested sample met the applicable requirement for the parameter being evaluated.

That could mean:

A contaminant was not detected above a limit.
A contaminant remained below an action level.
A particular regulatory requirement was satisfied.

However, a pass result should always be read together with:

What was tested
Which method was used
Which regulatory limits applied
Which batch was sampled

What Does “Fail” Mean?

A fail indicates that the representative sample did not satisfy an applicable testing requirement.

In regulated markets, failed batches generally cannot simply be released for retail sale without following whatever remediation, retesting or disposition process the jurisdiction allows.

For example, California regulations require cannabis batches to undergo specified laboratory testing before sale.

Does a High THC Result Prove Whole Melts Are Real?

No.

A number printed on a PDF cannot independently establish product authenticity.

Someone attempting to counterfeit packaging can also copy:

A laboratory logo
A QR code
A COA
A THC percentage
A batch number

The important issue is whether the entire verification chain is legitimate.

That is why COA review should be combined with the steps in our:

How to Tell if Whole Melts Are Real: 2026 Verification Guide.

How to Spot a Suspicious Whole Melts Lab Report

A laboratory document deserves closer inspection if you notice any of the following.

1. No Batch Number

If there is no way to connect the report with the physical product, traceability is weak.

2. Batch Numbers Don’t Match

Even a one-character difference deserves clarification.

3. Wrong Product Name

A report for another strain or concentrate does not verify the product in your hand.

4. Generic COA Used for Everything

Different products and production runs should not automatically rely on one universal report.

5. No Identifiable Laboratory

You should be able to determine who performed the testing.

6. Strange Dates

Testing dates should make sense relative to the product.

7. Only THC Is Reported

A potency result alone is not equivalent to comprehensive contaminant screening.

8. QR Code Opens a Generic Page

A useful verification code should provide meaningful product or batch information rather than simply redirecting to a homepage.

Why the Whole Melts Batch Code Matters More Than Packaging

Modern counterfeit packaging can look convincing.

Printing technology makes it possible to reproduce:

Logos
Boxes
Holographic elements
Strain names
Warning symbols
Color schemes
QR codes

Therefore, visual packaging alone has become a weaker verification tool.

Whole Melts currently positions its batch-code system as the link between the physical product and its laboratory documentation.

For a complete authenticity checklist, see our Whole Melts Verification Guide.

Does the COA Tell You Whether It Is Badder, Sugar or Crumble?

Sometimes the product description on the laboratory report will identify the concentrate type.

But physical-consistency names and chemical testing should be kept separate.

For example:

Badder

Describes a soft or whipped consistency.

Sugar

Describes a granular, crystal-rich consistency.

Shatter

Describes a hard, often glass-like consistency.

Crumble

Describes a dry, porous consistency.

Those words alone do not tell you THC percentage or contaminant results.

Our Badder vs Sugar vs Shatter vs Crumble Guide explains the terminology in detail.

Does a COA Tell You Whether It Is Live Resin or Live Rosin?

The product identification may indicate the extract type.

But the terms describe different processing categories.

Live Resin

Usually associated with fresh/fresh-frozen starting material and solvent-based extraction.

Live Rosin

Generally associated with fresh-frozen material processed through physical separation followed by heat and pressure.

Neither category is automatically superior simply because of the name.

Learn more in our Whole Melts Live Resin vs Live Rosin comparison.

Whole Melts Disposable Lab Results

A Whole Melts disposable combines two major components:

The extract
The hardware

A laboratory report on the cannabis formulation provides useful information concerning the sample that was analyzed.

However, you should not assume that an extract COA tells you everything about the electronic hardware itself.

Hardware quality involves separate considerations such as:

Battery
Heating element
Reservoir
Airflow system
Materials
Manufacturing controls

This distinction becomes especially relevant with devices such as the dual-chamber format.

For hardware information, read:

Whole Melts V7 Dual Chamber Explained: What’s Actually New.

Can a COA Prove a Cannabis Product Is Completely Safe?

No.

This is another common misunderstanding.

A COA reports the analyses actually performed on the tested sample.

It does not prove that every conceivable substance in the universe has been tested.

Nor does passing regulated contaminant testing mean cannabis use itself is risk-free.

The CDC notes that THC-containing cannabis products can cause impairment and that concentrated products used in vaping or dabbing can contain very high THC concentrations.

Laboratory testing is important.

But:

Tested does not mean harmless.

Those are different claims.

A Better Way to Evaluate Whole Melts Quality

Instead of looking for one magic indicator, use several layers of evidence.

1. Product Identity

What exactly is the product?

Start with our What Are Whole Melts? Guide if the terminology is unfamiliar.

2. Extract Type

Live resin or live rosin?

See the Live Resin vs Live Rosin Guide.

3. Physical Format

Badder, sugar, shatter or crumble?

See our Concentrate Texture Guide.

4. Batch Code

Does the package identify a specific production run?

5. COA

Does the report match the batch?

6. Cannabinoid Results

What does the laboratory actually report?

7. Contaminant Panels

Which analyses were performed, and did the batch pass?

8. Authenticity

Does the product pass the broader verification checks?

Use the 2026 Whole Melts Verification Guide.

Whole Melts COA Quick Checklist

Before relying on a lab report, ask:

Does the product name match?
Does the batch number match exactly?
Is the laboratory identified?
Are testing dates shown?
Does the report show cannabinoids?
Does it include applicable contaminant panels?
Are pass/fail results clear?
Does the QR or verification code lead to relevant information?
Does the report belong to this exact product rather than another one?
Is the report consistent with the packaging?

If several of these pieces are missing, investigate further.

Frequently Asked Questions About Whole Melts Lab Results

What does COA mean on Whole Melts?

COA means Certificate of Analysis. It is a laboratory report describing analytical results for the tested sample or batch.

How do I check Whole Melts lab results?

Start with the batch information or verification code on the product and make sure the resulting laboratory report matches the exact product and batch.

For the complete verification process, read How to Tell if Whole Melts Are Real.

What should a Whole Melts COA show?

Depending on the product and jurisdiction, a COA may include product identity, batch number, cannabinoid results, terpene data, pesticides, residual solvents, heavy metals, microbes, mycotoxins and other required analyses.

What does ND mean on a cannabis lab report?

ND generally means Not Detected above the applicable detection threshold of the analytical method.

What does LOD mean?

LOD means Limit of Detection.

What does LOQ mean?

LOQ means Limit of Quantitation.

What does “Pass” mean on a Whole Melts lab result?

It generally means the tested sample satisfied the applicable requirement for the particular analysis.

Is a higher THC percentage better?

Not necessarily. THC percentage is only one product characteristic. It does not independently establish purity, terpene composition, contaminant status or authenticity.

What’s the difference between THC and THCA?

THCA is a cannabinoid precursor that can convert into THC when heated. Laboratory reports may list the two separately.

Can I tell whether Whole Melts are real from THC percentage?

No. Authenticity requires more than a potency value.

Review the product, batch number, source, packaging and laboratory documentation together.

Does a QR code guarantee a product is real?

No. Anyone can generate a QR code. What matters is where the code leads and whether the resulting information genuinely matches the specific product and batch.

Should every Whole Melts product use the same COA?

No. Laboratory reports should be tied appropriately to the relevant product and production batch.

Does a clean-looking concentrate mean it passed lab testing?

No. Appearance cannot determine whether a product passed pesticide, solvent, heavy-metal or microbial analysis.

Does a lab-tested product mean cannabis is completely safe?

No. Laboratory testing can provide evidence about the analyses performed on a sample, but cannabis products containing THC can still cause impairment and other health risks.

Whole Melts Lab Results: The Bottom Line

A COA becomes useful when you know how to read it.

Do not stop at:

“It has a lab report.”

Ask:

Which product was tested?

Which batch?

Which laboratory?

When?

What cannabinoids were measured?

Which contaminants were screened?

What passed?

Does the report actually match the product?

The most important principle is simple:

A laboratory report should trace back to the specific batch in your hand.

Packaging can be copied.

QR codes can be copied.

Potency numbers can be copied.

The goal is to establish a traceable relationship between:

product → batch code → laboratory report → analytical results

For the broader authenticity process, continue with our Official Whole Melts Verification Guide.

If you want to understand the terminology printed on the product itself, read What Are Whole Melts? Complete Whole Melt Extracts Guide 2026.

And for concentrate-specific education, continue with:

Understand the product. Verify the batch. Read the report.

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How to Read Whole Melts Lab Results & COA: Complete 2026 Guide