Molekula
Etidronic acid monohydrate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Etidronic acid monohydrate is a synthetic chelating agent used in industrial water treatment, scale inhibition, and medical applications such as bone metabolism studies. It is a white crystalline powder with a molecular formula of C2H8O7P2•H2O and a molecular weight of 224.04 g/mol. It is stable at ambient storage conditions. Hazard classification includes signal word Danger. Molekula supplies Etidronic acid monohydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 g — $115.30 per pack
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Chloride (Cl-) | ≤1% |
| Iron (Fe) | ≤35ppm |
| Identification (IR) | Conforms to reference |
| pH (1% sol. 25°C) | ≤2% |
| Phosphoric acid (H3PO4) | ≤0.7% |
| Assay(HEDP .H2O) | ≥98% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90025006 |
| CAS Number | 25211-86-3 |
| IUPAC Name | (1-hydroxy-1-phosphonoethyl)phosphonic acid;hydrate |
| EC Number | 629-385-9 |
| Molecular Formula | C2H8O7P2•H2O |
| Molecular Weight | 224.04 |
| Exact Mass | 223.9851 |
| SMILES | CC(O)(P(=O)(O)O)P(=O)(O)O.O |
| InChIKey | KKNZXUHBWLPUFN-UHFFFAOYSA-N |
| InChI | InChI=1S/C2H8O7P2.H2O/c1-2(3,10(4,5)6)11(7,8)9;/h3H,1H3,(H2,4,5,6)(H2,7,8,9);1H2 |
| PubChem CID | 12521030 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| HTS Code | 2931.49.0080 |
| Tariff Code | 2931493000 |
Safety & GHS
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Corrosive
GHS05
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Hazardous to the Environment
GHS09
Hazard statements
- H318 Causes serious eye damage
- H411 Toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+P351+P338 IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do, continue rinsing
- P391 Collect spillage
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- (1-hydroxy-1-phosphonoethyl)phosphonic acid;hydrate
- (1-Hydroxyethane-1,1-diyl)bis(phosphonic acid) hydrate
- (1-Hydroxyethylidene)bisphosphonic acid monohydrate
- 1-Hydroxyethylidene-1,1-diphosphonic acid monohydrate
- Ethane-1-hydroxy-1,1-diphosphonic acid monohydrate
- Etidronate hydrate
- ETIDRONIC ACID MONOHYDRATE (USP-RS)
- Hydroxyethylidenebisphosphonic acid monohydrate
- Phosphonic acid, (1-hydroxyethylidene)bis-, monohydrate
Frequently asked questions
What is etidronic acid monohydrate used for?
It is primarily used as a scale and corrosion inhibitor in industrial water treatment and as a chelating agent in cleaning formulations.
What is the chemical formula and molecular weight of etidronic acid monohydrate?
The formula is C2H8O7P2•H2O with a molecular weight of 224.04 g/mol.
How should etidronic acid monohydrate be stored?
It should be stored at ambient temperature, away from moisture and incompatible materials.
What grade is available for etidronic acid monohydrate?
We supply it as a technical grade; custom grades are available upon request.
Can Molekula supply etidronic acid monohydrate in bulk?
Yes, we offer bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with an order of etidronic acid monohydrate?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.