Hydroxylapatite (Ca5(OH)(PO4)3)

CAS 1306-06-5

U.S. production volumes are classified as confidential business information.

Molecular structure of 1306-06-5 — 5 Ca²⁺ · 1 OH⁻

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Top sourceNo public record

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023.

Where It Comes From

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Confidential · Imports Confidential

EPA-registered manufacturers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Prayon

Domestic parents -- activity not disclosed (3)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Brenntag

Icl Specialty Products North America

Nc Holdings Usa

EPA-registered importers (2)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Geschwister Oetker Beteiligungen Kg · DE Germany

Budenheim Usa

Why It Matters

Sectors

AgricultureFoodPlastics & RubberPaper & Printing

Downstream UsesNot recorded

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

Industrial Uses

Used in 3 sectors as 3 functional roles.

•Soil amendments (fertilizers) in Pesticide, Fertilizer, and Other Agricultural Chemical ManufacturingNot Known or Reasonably Ascertainable
•Stabilizing agent in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Filler in Paper Manufacturing (97%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.09/gBLD Pharmatech Ltd.

CountryChina

Pack$91.00 / 1 kg

Purity90%

Vendors4 available

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

3 more vendors

Vendor	Country	$/g	Pack	Purity
AK Scientific Specialized	United States	$0.14	500 g	34%
Apollo Scientific UK	United Kingdom	$0.33	10 kg	95%
Combi-Blocks, Inc.	United States	$1.80	100 g	98%

Chemical Identity

CAS1306-06-5

PubChem CID14781

DTXSIDDTXSID10872538

FormulaCa5HO13P3

Mol. Weight502.3 g/mol

SMILES[OH-].[O-]P(=O)([O-])[O-].[O-]P(=O)([O-])[O-].[O-]P(=O)([O-])[O-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2]

Data Sources

EPA CompTox (DSSTox) · DTXSID10872538Retrieved 2026-04-06
PubChem · compound 14781Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

← Back to Dashboard ← Back to Agriculture

Brief citations

Hydroxylapatite (Ca5(OH)(PO4)3) (CAS 1306-06-5) https://chemicalindependence.com/chemical/1306-06-5/ EPA CompTox (DSSTox): DTXSID10872538. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID10872538 PubChem: 14781. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/14781 EPA Chemical Data Reporting: 1306-06-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1306-06-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting