Histamine
Drug ingredientCAS 51-45-6
This chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.
This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.
Why supply is unknownProduction is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.
Where It Comes From
Customs basis: HS 293329 · basket
These shares come from HS customs code 293329, which covers 173 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Australia
- Brazil
- Czech Republic
- Ireland
- Sweden
- Ukraine
- Poland
- United Arab Emirates
- Hungary
- Israel
- Netherlands
- Canada
- Saudi Arabia
- Greece
- Belgium
- Austria
- Latvia
- Singapore
- Denmark
5 FDA-registered drug labelers
Why It Matters
Appears in 5 drug and cosmetic product listings (FDA).
- •Allergena Pet Dander
- •Allergy Nosode 4017
- •Breathe-Ease
- •Isopathic Phenolic Rings
- •Positive Skin Test Control - Histamine
Vendor Pricing
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
16 more vendors
| Vendor | Country Supplier country. Where available, shows shipping origin. When the supplier ships from a different country than where they are registered, both are shown. Most suppliers show registration country only. | $/g | Pack | Purity |
|---|---|---|---|---|
| A2B Chem LLC | United States | $11.88 | 25 g | 97% |
| Aaron Chemicals LLC | Hong Kong | $11.90 | 100 g | 97% |
| Combi-Blocks, Inc. | United States | $13.80 | 100 g | 97% |
| AA BLOCKS | United States | $13.92 | 25 g | 97% |
| Ambeed, Inc. | United States | $17.60 | 25 g | 97% |
| Fluorochem EU | Germany | $26.01 | 10 g | 96% |
| Angene International Limited | United States | $30.20 | 10 g | 97% |
| Fluorochem UK | United Kingdom | $30.32 | 5 g | 96% |
| AstaTech, Inc | United States | $48.60 | 5 g | 95% |
| TargetMol Chemicals | China → United States | $68.00 | 1 g | 99.99% |
| Sigma-Aldrich (Rush Stock) | Germany | $68.04 | 25 g | 97% |
| Sigma-Aldrich | Germany | $68.04 | 25 g | 97% |
| TargetMol Chemicals EU | Austria | $112.00 | 500 mg | 99.99% |
| TargetMol Chemicals US | United States | $255.00 | 200 mg | 99.99% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 97% |
| Interbioscreen | Hong Kong | $4864.50 | 100 mg | 95% |
Chemical Identity
Data Sources
- PubChem · compound 774Retrieved 2026-04-07
- EPA TSCA InventoryRetrieved 2026-04-24
- FDA National Drug Code directoryRetrieved 2026-04-07
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
Histamine (CAS 51-45-6) https://chemicalindependence.com/chemical/51-45-6/ PubChem: 774. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/774 EPA TSCA Inventory: CAS 51-45-6. Retrieved 2026-04-24. https://www.epa.gov/tsca-inventory FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 293329 for CAS 51-45-6. Reporting year: 2024. https://usatrade.census.gov/