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Clinical Science Laboratory

Hemp Compliance & Safety Testing


Accuracy. Reliability. Efficiency.

Servicing Since 1974

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ISO 17025:2017 Accredited

Clinical Science Laboratory, Inc. is accredited to the international standard ISO/IEC 17025:2017 for the purposes of cannabis testing, ensuring methods are fully validated and independently reviewed.


DEA Schedule I - V

Clinical Science Laboratory, Inc. is registered with the United States Drug Enforcement Administration (DEA) for the handling of controlled substances.  We are authorized to handle Schedule I through Schedule V drugs. As of December 31, 2022, the USDA requires laboratories to be registered with the DEA in order to conduct THC testing in Hemp.

What Sets Clinical Science Laboratory Apart From the Rest

Clinical Science Laboratory, Inc. (CSL) is a CAP Accredited reference, drug testing, and toxicology laboratory which first opened its doors to the world in 1974.

With almost 50 years of expertise at the helm, CSL has been standing at the forefront of clinical laboratory testing. With all that experience CSL stands to deliver some of the fastest turn-around times in the country.

We are determined to apply this same level of throughput in hemp testing with our new state-of-the-art machines and facilitites.


Dr. Stanley Elfbaum, CEO and Director

Hemp Testing & Services

Image by Matthew Brodeur

Potency testing measures both the presence of cannabinoids (fingerprinting) and gives a quantitative level above a certain threshold. Understanding the potency values of particular cannabinoids is therefore not only compulsory, but it’s also crucial for determining the product’s strengths and uses. 

Image by Elsa Olofsson

Terpene testing determines the presence and levels of these volatile compounds that are partially responsible for cannabis’s aromatic properties. Identifying the terpenes present in a sample adds to its unique identity and it is information that consumers often desire.

Image by Mika Baumeister
Heavy Metals

Heavy metal testing determines the presence and level of toxic heavy metals. Detecting the level of heavy metals in hemp-based products ensures that the products are safe for human consumption or use.

Image by National Cancer Institute
Residual Solvents

Residual solvent testing measures the presence and level of residual solvents in hemp products following liquid extractions. Identifying these remaining solvents and their respective levels in client products ensures that the product is safe for human consumption.


Pesticide testing measures the presence and level of pesticides remaining on hemp and hemp products. Identifying the presence of enduring pesticides in client products ensures that the product is safe for human consumption.

Image by Sangga Rima Roman Selia

Mycotoxin testing measures the presence and levels of mycotoxins produced by molds and other fungi growing in or around hemp. Identifying the presence of mycotoxins in client products ensures that the product is safe for human consumption.

Image by Adrian Lange
Microbial Contaminants

Microbial contaminant testing measures the presence and levels of microbes in cannabis products. Identifying a lack of microbial contaminants in client products helps to ensure that the product is safe for human use.

*Not currently ISO 17025 accredited testing*

Delivering Quality Service for 50 Years


At Clinical Science Laboratory 
We Are Committed To Delivering Accurate Results 
As Quickly As Possible

At Clinical Science Laboratory, Inc. there is one trait that permeates throughout the lab. Whether it's during screenings or in the confirmations department, at CSL, we are committed to always being efficient.

For almost 50 years Clinical Science staff members have dedicated their expertise to ensure each client is happy, and that results are the most accurate they can possibly be.

Now, as we are entering this new chapter in our company's history we are preparing to apply that same level of dedication and expertise to hemp testing. We realize the major implications that our results can have on our clients, and ultimately the safety of others - we are steadfast in ensuring that our facility is optimized to once again deliver top-notch results.

Please visit our About Us to learn more about Clinical Science Laboratory, Inc.


We ARE Clinical Science Laboratory, Inc.

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