C2H8O7P2
206.03 g/mol
APIDanger
Etidronic acid
CAS2809-21-4EC220-552-8
Category
API
Compound Class
Organic Acid
Primary Use
Pharmaceutical Raw Material
Etidronic acid is a bisphosphonate compound that inhibits the formation and dissolution of hydroxyapatite crystals by adsorbing to calcium phosphate surfaces. It is used as a chelating agent and in pharmaceutical manufacturing as a bone resorption inhibitor.
Bone resorption inhibitor in pharmaceutical manufacturingChelating and sequestering agentCorrosion and scale inhibitor
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ApplicationSame Use
Clodronic acid
CAS10596-23-3
pharmaceutical raw material
ReferenceSame Category
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pharmaceutical raw material
ReferenceSame Category
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CAS2827-21-6
pharmaceutical raw material
ReferenceSame Category
Rucaparib
CAS283173-50-2
pharmaceutical raw material
ReferenceSame Category
Sn-glycero-3-phosphocholine
CAS28319-77-9
pharmaceutical raw material
Referencestereoisomer of
Etidronate tetrasodium
CAS3794-83-0
chelating agent and antiscalant
Referencestereoisomer of
Etidronate disodium
CAS7414-83-7
pharmaceutical raw material
Safety Reference
Danger
H290May be corrosive to metals
H302Harmful if swallowed
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
H413May cause long lasting harmful effects to aquatic life
H371May cause damage to organs
Customs Tariff Classification
The international HS code for Etidronic acid (CAS 2809-21-4) is 2931.49.
HS code (international, 6-digit)
2931.49
EU CN code (8-digit)
2931 49 30
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
(1-hydroxy-1-phosphonoethyl)phosphonic acid
InChIKey
DBVJJBKOTRCVKF-UHFFFAOYSA-N
SMILES
CC(O)(P(=O)(O)O)P(=O)(O)O
Synonyms (69)
- 1000SL
- EHDP
- HDEPA
- HEDP
- HEDSPA
- OEDFK
- OEDP
- Acide etidronique [INN-French]
- Acido etidronico [INN-Spanish]
- Acidum etidronicum [INN-Latin]
- Etidronic acid (USAN/INN)
- 2809-21-4 (freeacid)
- Acetodiphosphonic acid
- Acide etidronique
- Acido etidronico
- Acidum etidronicum
- Dequest 2010
- Dequest 2015
- Dequest Z 010
- Dicalcium EHDP
- Didronel
- Diphosphonate (base)
- EHDP, Dicalcium
- ETIDRONIC ACID [MART.]
- Etidron
- Etidronate (Didronel)
- Etidronate, Dicalcium
- Etidronate, Disodium
- Etidronate, Sodium
- Etidronic acid
- Etidronsaeure
- Ferrofos 510
- Ksidifon;
- RP 61
- Turpinal SL
- Xidiphon
- Xidiphone
- Xydiphone
- etidronate
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