# NAICS 325413: In-Vitro Diagnostic Substance Manufacturing

The SBA size standard for NAICS 325413 is 1,250 employees (13 CFR 121.201).

| Field | Value |
| --- | --- |
| Code | 325413 |
| Title | In-Vitro Diagnostic Substance Manufacturing |
| Level | 6 |
| Parent | 32541 |
| Size standard | 1,250 employees |
| Footnote | - |

## Description

This U.S. industry comprises establishments primarily engaged in manufacturing in-vitro (i.e., not taken internally) diagnostic substances, such as chemical, biological, or radioactive substances. The substances are used for diagnostic tests that are performed in test tubes, petri dishes, machines, and other diagnostic test-type devices.

## Sources

- Census NAICS: https://www.census.gov/naics/
- SBA size standards: https://www.sba.gov/document/support-table-size-standards

## API and MCP

- REST: GET https://samgovapi.io/api/v1/naics/325413/size-standard?revenue_usd=...
- MCP tools: naics_lookup, size_standard_check

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