Molekula
Sodium cacodylate trihydrate
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 cacodylate trihydrate is an organoarsenic compound primarily used as a buffer in biochemical and molecular biology applications, including gel electrophoresis and protein stabilization. It is also employed in microscopy and as a preservative in certain formulations. Beyond the laboratory, it has been used in agriculture as an herbicide and pesticide ingredient. This chemical has a CAS number of 6131-99-3, a molecular formula of (CH3)2AsO2Na · 3H2O, and a molecular weight of 214.03 g/mol. It should be stored at ambient conditions and handled with caution, as it carries a **Danger** signal word due to its toxicity. Molekula supplies Sodium cacodylate trihydrate 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 — £29.10 per pack ex VAT · £34.92 inc. VAT
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5 g — £85.10 per pack ex VAT · £102.12 inc. VAT
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100 g — £280.00 per pack ex VAT · £336.00 inc. VAT
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 |
| Purity | ≥ 98.0% |
| Identification (IR) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | II |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 89990266 |
| CAS Number | 6131-99-3 |
| IUPAC Name | sodium;dimethylarsinate;trihydrate |
| Molecular Formula | (CH3)2AsO2Na · 3H2O |
| Molecular Weight | 214.03 |
| Exact Mass | 213.9798 |
| SMILES | C[As](=O)(C)[O-].O.O.O.[Na+] |
| InChIKey | RLGWPHBPRCROJO-UHFFFAOYSA-M |
| InChI | InChI=1S/C2H7AsO2.Na.3H2O/c1-3(2,4)5;;;;/h1-2H3,(H,4,5);;3*1H2/q;+1;;;/p-1 |
| PubChem CID | 23679059 |
| UN Number | UN1688 |
| REACH Code | Y110 |
| HTS Code | 29319090 |
| Tariff Code | 2931900090 |
Safety & GHS
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Toxic
GHS06
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- H301 + H331 Toxic if swallowed or inhaled
- H351 Suspected of causing 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
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, 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
- ARSINE OXIDE, HYDROXYDIMETHYL-, SODIUM SALT, TRIHYDRATE
- C2H12AsNaO5
- Cacodylic acid sodium salt trihydrate
- Cacodylic acid sodium trihydrate
- Dimethylarsenic acid sodium salt trihydrate
- Dimethylarsinic acid sodium salt trihydrate
- Hydroxydimethylarsine oxide sodium salt trihydrate
- penta-mu-aqua-disodium(I) bis(dimethylarsenate)
- sodium dimethylarsinate trihydrate
- Sodium dimethylarsinic acid trihydrate
Frequently asked questions
What is sodium cacodylate trihydrate commonly used for?
Sodium cacodylate trihydrate is primarily used as a buffer in biological and biochemical applications, such as electron microscopy for tissue fixation, and in some analytical chemistry processes.
What is the chemical formula and molecular weight of sodium cacodylate trihydrate?
The chemical formula is **(CH₃)₂AsO₂Na · 3H₂O**, and the molecular weight is **214.03 g/mol**.
How should sodium cacodylate trihydrate be stored?
Store at **ambient temperature** in a tightly sealed container, away from incompatible substances and moisture.
What grade or purity level is available for sodium cacodylate trihydrate?
Molekula supplies **analytical and reagent-grade sodium cacodylate trihydrate**, meeting standard purity requirements for laboratory use.
Can Molekula supply sodium cacodylate trihydrate in bulk quantities?
Yes, bulk quantities are available upon request—please contact our sales team for pricing and lead times.
What documentation comes with an order of sodium cacodylate trihydrate?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet.
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.