PSC B504: Special Studies/Analysis – Chemical/Biological
B504 is the product and service code (PSC) federal agencies use for special studies/analysis – chemical/biological, in the special studies – not r and d group. Here are the contracts open under it now, the NAICS codes it pairs with, and who buys and wins this work.
- Open contracts now
- 0
- Spending, FY2026
- $69.8 million
- Share to small businesses
- 12%
Where B504 sits in the PSC Manual
- Category: Service
- Group B: Special Studies/Analysis, Not R&D
- Group B5: Special Studies – Not R and D
- Code B504: Special Studies/Analysis – Chemical/Biological
NAICS codes used with PSC B504
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with B504 most often:
| NAICS | Industry | Spent, last 3 years |
|---|---|---|
| 541380 | Testing Laboratories and Services | $146.7 million |
| 541620 | Environmental Consulting Services | $22 million |
| 541714 | Research and Development in Biotechnology (except Nanobiotechnology) | $16.5 million |
| 541715 | Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $7.1 million |
| 541611 | Administrative Management and General Management Consulting Services | $6.6 million |
| 541690 | Other Scientific and Technical Consulting Services | $4.2 million |
Who buys under PSC B504
Agencies with the most contract dollars under B504 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Agricultural Research Service | $56.5 million |
| Environmental Protection Agency | $42.6 million |
| Centers for Disease Control and Prevention | $26.3 million |
| Office of Procurement Operations | $24 million |
| Food and Drug Administration | $16.7 million |
| Washington Headquarters Services | $13.1 million |
| Department of the Army | $11 million |
| Federal Acquisition Service | $5.7 million |
Federal spending under PSC B504 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $82.7 million |
| FY2025 | $59.9 million |
| FY2026 | $69.8 million |
| FY2027 (so far) | $0 |
Who wins PSC B504 contracts
| Company | Obligated, last 3 years |
|---|---|
| Merrick & Company | $70.9 million |
| Ginkgo Bioworks, Inc. | $26.7 million |
| Icf Incorporated, L.L.C. | $19.5 million |
| Techlaw Consultants Inc | $14.9 million |
| Mriglobal | $13.1 million |
| Serco Inc | $8.5 million |
| Signature Science LLC | $6.4 million |
| Bryce Space and Technology, LLC | $5.7 million |
| Qualis, LLC | $5.6 million |
| President and Fellows of Harvard College | $4.7 million |
Related PSC codes
- B502 Special Studies/Analysis – Air Quality
- B503 Special Studies/Analysis – Archeological/Paleontological
- B505 Special Studies/Analysis – Cost Benefit
- B506 Special Studies/Analysis – Data (Other Than Scientific)
- B507 Special Studies/Analysis – Economic
- B509 Special Studies/Analysis – Endangered Species: Plant/Animal
- B510 Special Studies/Analysis – Environmental Assessments
- B513 Special Studies/Analysis – Feasibility (Non – Construction)
- B516 Special Studies/Analysis – Animal/Fisheries
- B517 Special Studies/Analysis – Geological
Frequently asked questions
What is PSC B504?
B504 is the service code in the federal Product and Service Code (PSC) Manual for special studies/analysis – chemical/biological, under B (Special Studies/Analysis, Not R&D) and B5 (Special Studies – Not R and D). Agencies put a PSC on every contract to record what they bought.
What is the difference between a PSC and a NAICS code?
A PSC describes what the government is buying. A NAICS code describes the industry of the business doing the work, and it sets the SBA size standard for small business set-asides. Every contract notice has both.
Which NAICS code goes with PSC B504?
Most federal contract dollars under PSC B504 go with NAICS 541380 (Testing Laboratories and Services), according to USAspending.gov. The contracting officer picks the NAICS code for each solicitation, so check the notice.
How do I find contracts that use PSC B504?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. FedReady can match new ones to your business and email you, free.