histamine phosphate

Drug ingredient

CAS 51-74-1

This chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.

US productionNot reported

Import value, 2024$114M

Top sourceChina 26%

EPA lists this chemical as inactive, meaning no company reported making, importing or processing it in the US from 2006 to 2016.

Why supply is unknown

Production 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.

Source Countries

Country of origin for US imports, from Census customs data (2024).

CN 26%ChinaIN 17%IndiaKR 16%South KoreaDE 9%GermanyIT 9%Italy

Australia
Brazil
Czech Republic
Ireland
Sweden
Ukraine
Poland
United Arab Emirates
Hungary
Israel
Netherlands
Canada
Saudi Arabia
Greece
Belgium
Austria
Latvia
Singapore
Denmark

1 FDA-registered drug labeler

ALK-Abello, Inc.

Why It Matters

Sectors

Health

Downstream Uses

Appears in 1 drug and cosmetic product listings (FDA).

•Histamine Positive Skin Test Control

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Vendor Pricing

$2.62/gAaron Chemicals LLC

CountryHong Kong

Pack$262.00 / 100 g

Purity97%

Vendors10 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

9 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$2.65	100 g	97%
A2B Chem LLC	United States	$3.51	100 g	97%
AA BLOCKS	United States	$4.58	100 g	97%
Combi-Blocks, Inc.	United States	$6.40	25 g	98%
Fulfilled by Molport	Latvia	$9.00	1 g	97%
Angene International Limited	United States	$9.28	25 g	98%
Ambeed, Inc.	United States	$12.00	5 g	97%
MedChemExpress MCE	Sweden	$16.46	5 g	99.34%
Angene	China → Hong Kong	$4266.67	30 mg	97%

Chemical Identity

CAS51-74-1

PubChem CID65513

DTXSIDDTXSID7058759

FormulaC5H15N3O8P2

Mol. Weight307.14 g/mol

SMILESC1=C(NC=N1)CCN.OP(=O)(O)O.OP(=O)(O)O

Data Sources

PubChem · compound 65513Retrieved 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

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Brief citations

histamine phosphate (CAS 51-74-1) https://chemicalindependence.com/chemical/51-74-1/ PubChem: 65513. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/65513 EPA TSCA Inventory: CAS 51-74-1. 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 51-74-1. Reporting year: 2024. https://usatrade.census.gov/