MCR Labs provides a comprehensive array of ISO-17025 accredited testing services to individuals and organizations operating in the cannabis and pharmaceuticals space. Our testing helps providers meet regulatory compliance requirements and gives patients and recreational users the confidence that the products they’ll be consuming are safe and have the cannabinoids they are seeking.

The analytical scientists at MCR Labs are fully trained to efficiently provide reliable and accurate data with a critical eye to safety and consistency.

If you are interested in having a cannabis product tested at MCR Labs, check out the tests we offer below and learn read our procedure for submitting a sample.

Here are the sample amounts needed for each test and the complete scope of analytes our services screen for:

Sample Size Requirements

Service                               Quantities Required

flower concentrates & extracts infused products & edibles
cannabinoid profile 0.3 grams 0.2 grams 1.0 grams
terpene profile 0.2 grams 0.2 grams NA
pesticide screen 1.0 grams 0.5 grams NA
heavy metal analysis 0.3 grams 0.3 grams NA
microbiological assay 1.0 grams 1.0 grams 1.0 grams
mycotoxin screen 0.5 grams 0.5 grams 1.0 grams
residual solvent analysis NA 0.5 grams NA

Potency Profiles


delta 9-tetrahydrocannabinol (THC) tetrahydrocannabinolic acid (THCA)
cannabidiol (CBD) cannabidiolic acid (CBDA)
cannabichromene (CBC) cannabichromenic acid (CBCA)
cannabidivarin (CBDV) cannabidivarinic acid (CBDVA)
cannabigerol (CBG) cannabigerolic acid (CBGA)
cannabicyclol (CBL) cannabicyclolic acid (CBLA)
cannabinol (CBN) cannabinolic acid (CBNA)
tetrahydrocannabivarin (THCV) tetrahydrocannabivarinic acid (THCVA)
delta 8-tetrahydrocannabinol (∆8-THC)



α-Pinene Camphene β-Myrcene
β-Pinene δ-3-Carene α-Terpinene
Ocimene δ-Limonene β-Ocimene
Eucalyptol у-Terpinene Terpinolene
Linalool Isopulegol Geraniol
β-Caryophyllene α-Humulene Nerolidol 1
Nerolidol 2 Guaiol Caryophyllene Oxide

Safety Screens

Heavy Metals

arsenic cadmium
lead mercury



Bifenazate Bifenthrin
Cyfluthrin Etoxazole
Imazalil Imidacloprid
Myclobutanil Spiromesifen


Microbiological Contaminants & Toxins

Total Viable Aerobic Bacteria Total Coliform Bacteria
Total Bile-Tolerant Gram-Negative Bacteria Total Yeast & Mold
E. coli & Salmonella Aflatoxin B1 & B2 and G1 & G2
Ochratoxin A (OTA)


Residual Solvents

n-Butane Isobutane
Propane Hexane

Tests We Offer

We work with patients, doctors, cultivators, bakers, dispensaries, and anyone else with a desire or need to know what’s in the products they’re using, making, or selling. We offer the following tests for flower, extracts, edibles, or other types of cannabis products:

Cannabinoid/Potency Profile


For medical cannabis, the Commonwealth of Massachusetts requires four cannabinoids to be screened for: THCA, d9-THC, CBDA, and CBD. In addition to these four, we also screen for CBGA, CBC, CBDV, THCV, CBN, and d8-THC. We utilize High-Performance Liquid Chromatography (HPLC) for cannabinoid analysis, and potency is measured as a weight based percentage.


Beyond meeting regulatory requirements, cannabinoid testing provides the data necessary to determine product potency and quality. Additionally, identifying and quantifying cannabinoids can help doctors and patients target specific symptoms and assist in designing a safe and effective dosage.

Heavy Metals Screen


Arsenic (As), Cadmium (Cd), Mercury (Hg), and Lead (Pb) can cause serious health problems if consumed. For consumer safety, the Commonwealth of Massachusetts has set strict limits on the levels of heavy metals for cannabis products that can be sold to patients at dispensaries.


Heavy metals find their way into cannabis from the water, nutrients, or growing medium during cultivation, and may bioaccumulate in the plant. Seemingly clean operations may still find high levels of heavy metals in their crops or products without an obvious source. Using an Inductively Coupled Plasma Mass Spectrometer (ICP-MS), we can quantify the amount of each metal present in a sample down to the parts per billion range and help to identify from where these metals are originating.

Microbiological Contaminant Screen


Yeast, mold, and bacteria, including E. coli and Salmonella, are microbiological contaminants that may be found in cannabis. Some mold species can produce mycotoxins, a family of hazardous compounds. Inhaling even small amounts of microbiological contaminants may lead to infections, especially in patients with compromised immune systems.


Microbiological contaminants may come from many sources, including human contact or the growing environment. By utilizing validated Most Probable Number (MPN) methods and Enzyme Linked Fluorescent Assay (ELFA), we are able to meet standardized testing requirements for any product. Beyond screening for these contaminants, MCR Labs can also provide consultation to help identify any potential root causes.

Pesticides Screening.


Pesticides are used to protect plants from biological pests, contaminants, and diseases. Massachusetts requires testing of all cannabis grown under the Medical Marijuana Program.

How we help

When inhaled, especially by patients with compromised immune systems, pesticides can cause serious health problems. We can help you get the data you need to not only pass the regulatory requirements, but also to relieve customers’ concerns about inhaling these dangerous compounds.

Pesticide Screening

Residual Solvent Testing.


Solvents are used to separate cannabinoids and terpenes from the rest of the plant material during extraction. Following extraction, residual amounts of the solvents used may remain in the consumable product. Testing for residual solvent levels in cannabis extracts is required by the Commonwealth of Massachusetts and is important for ensuring product safety.

How we help

Consuming products with high concentrations of residual solvents may be hazardous to a patient’s health. MCR Labs tests for residual solvents and can help ensure you are producing, selling, and consuming clean products.

Terpenes Panel.


Terpenes are the compounds partially responsible for the smell and taste of cannabis. They have also been noted to interact synergistically with cannabinoids and to have their own health benefits and treatment applications.

How we help

Terpene screening is not yet required by Massachusetts law. However, many cannabis enthusiasts and growers are interested to know the terpene profile of their cannabis products and can benefit from seeing a panel generated by MCR. Having terpene profiles allows growers to manipulate the smells and effects of their products and gives patients the ability to make informed selections of cannabis products to suit their treatment needs.


MCR Labs is committed to helping cannabis users understand the potential benefits and risks of cannabis use as well as how to determine which products might work best for their needs.

There is still a lot to learn about these complex plants and how the compounds they contain may be harnessed to relieve ailments and get more enjoyment out of life. By seeking knowledge about the cannabis plant and the testing that products undergo, patients and recreational users can better understand what to look for when selecting cannabis products.

Cannabis affects each person differently. With this in mind, MCR is working to foster safe and responsible exploration, so that cannabis community members can learn what works best for them.

Please browse our resources page regularly and follow us on social media to get the most up-to-date information about our exploration into cannabis science.

R & D

MCR Labs provides a comprehensive array of analytical services to meet your cannabis R&D requirements, and our analytical scientists are fully trained to efficiently provide reliable tests with a critical eye to safety and consistency.

We pride ourselves on keeping a rigorous eye on the emerging science of how cannabis can serve a variety of medical needs. We continuously develop new testing and reporting procedures to ensure that our tests are relevant and compliant with all applicable regulations and methodological standards.

If you would like to discuss R&D collaborations, please reach out using our contact page or by emailing info@MCRLabs.com.