Molekula
Sodium hydrogen arsenate heptahydrate
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
Sodium hydrogen arsenate heptahydrate is an inorganic arsenic compound primarily used as a herbicide, insecticide, and in analytical chemistry for arsenic-based tests. In textiles it is used for dyeing and fabric printing with Turkey-red oil, and it serves as a starting material for manufacturing other arsenates. It appears as a white crystalline solid, soluble in water. CAS 10048-95-0, molecular formula Na₂HAsO₄·7H₂O, molecular weight 312.01 g/mol, stored at ambient conditions. Classified as dangerous due to its high toxicity. Molekula supplies sodium hydrogen arsenate heptahydrate 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 solid |
| Identification | Conforms to reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | II |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless, monoclinic crystals |
| Odour | Odorless |
| Melting Point | 130 °C |
| Boiling Point | 180 °C at 760 mmHg (decomposes) |
| Refractive Index | 1.462 |
Source: PubChem CID 61460 (HSDB, ICSC, CAMEO Chemicals)
Identification
| Property | Value |
|---|---|
| SKU | 90036633 |
| CAS Number | 10048-95-0 |
| IUPAC Name | disodium;hydrogen arsorate;heptahydrate |
| Molecular Formula | Na2HAsO4 · 7H2O |
| Molecular Weight | 312.01 |
| Exact Mass | 311.9626 |
| SMILES | O.O.O.O.O.O.O.O[As](=O)([O-])[O-].[Na+].[Na+] |
| InChIKey | KOLXPEJIBITWIQ-UHFFFAOYSA-L |
| InChI | InChI=1S/AsH3O4.2Na.7H2O/c2-1(3,4)5;;;;;;;;;/h(H3,2,3,4,5);;;7*1H2/q;2*+1;;;;;;;/p-2 |
| PubChem CID | 61460 |
| UN Number | UN1685 |
| REACH Code | Y110 |
| HTS Code | 28429090 |
| Tariff Code | 2842908080 |
Safety & GHS
-
Toxic
GHS06
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H301 Toxic if swallowed
- H331 Toxic if inhaled
- H350 May cause cancer
- H400 Very toxic to aquatic life
- H410 Very 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
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
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
- Arsenic acid (H3AsO4), disodium salt, heptahydrate
- Dibasic sodium arsenate (Na2HAsO4.7H2O)
- Dibasic sodium arsenate heptahydrate
- Disodium arsenate heptahydrate
- Disodium hydrogen arsenate (Na2HAsO4) heptahydrate
- Disodium monohydrogen arsenate heptahydrate
- Hydrogen disodium arsenate (HNa2AsO4) heptahydrate
- Sodium acid arsenate, heptahydrate
- Sodium arsenate, dibasic, heptahydrate
- Sodium orthoarsenate heptahydrate
Frequently asked questions
What is sodium hydrogen arsenate heptahydrate commonly used for?
It is primarily used in wood preservation, as a pesticide, and in some industrial applications like leather tanning and dyeing.
What is the chemical formula and molecular weight of sodium hydrogen arsenate heptahydrate?
The formula is **Na₂HAsO₄·7H₂O**, and the molecular weight is **312.01 g/mol**.
How should sodium hydrogen arsenate heptahydrate be stored?
Store at **ambient temperature** in a cool, dry place, away from incompatible substances, and ensure proper ventilation.
What grade or purity level is available for this product?
Molekula supplies **technical/industrial grade** sodium hydrogen arsenate heptahydrate, meeting standard purity requirements for industrial applications.
Can Molekula supply sodium hydrogen arsenate heptahydrate in bulk quantities?
Yes, we offer bulk packaging options—please contact our sales team for specific quantities and logistics details.
What documentation comes with an order of sodium hydrogen arsenate heptahydrate?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and compliance documentation as required.
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.