Molekula
Sodium thiosulfate anhydrous (Technical Grade)
Sodium thiosulfate anhydrous (Technical Grade) is a chemical compound used in photographic fixing, water treatment, and analytical chemistry. It is a white, crystalline powder with no signal word required for safety. CAS: 7772-98-7, molecular formula: Na2O3S2, molecular weight: 158.11 g/mol. Stored at ambient temperature. Molekula supplies Sodium thiosulfate anhydrous (Technical Grade) from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Sodium thiosulfate anhydrous (Technical Grade) is a chemical compound used in photographic fixing, water treatment, and analytical chemistry. It is a white, crystalline powder with no signal word required for safety. CAS: 7772-98-7, molecular formula: Na2O3S2, molecular weight: 158.11 g/mol. Stored at ambient temperature. Molekula supplies Sodium thiosulfate anhydrous (Technical Grade) from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Specifications
| Property | Value |
|---|---|
| Appearance | White to off-white powder |
| Water-insoluble matter | ≤ 0.1% |
| pH | 6.5 - 9.5 (10% w/w, 25°C) |
| Purity | 98.0 - 102.0% |
| Heavy Metals (Pb) | ≤ 0.002% |
| Iron (Fe) | ≤ 0.005% |
| Identification (IR) | Conforms to Reference |
| Sodium Sulphide | ≤ 0.002% |
| Sulphites (Na2SO3) | ≤ 0.5% |
| Alkaline Earth metals (Ca) | ≤ 0.2% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Shelf Life | 24 months |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| CAS Number | 7772-98-7 |
| Molecular Formula | Na2O3S2 |
| Molecular Weight | 158.11 |
| SMILES | [Na].O=S(=O)(O)S |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 28323010 |
| Tariff Code | 2832100000 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
For research and industrial use only
Documents
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.
Pricing & pack sizes
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is sodium thiosulfate anhydrous (technical grade) used for?
It is commonly used in photographic fixing, water treatment, and as a reagent in analytical chemistry.
What is the chemical formula and molecular weight?
The formula is Na2O3S2 and the molecular weight is 158.11 g/mol.
How should sodium thiosulfate anhydrous be stored?
It should be stored at ambient temperature, protected from moisture and contamination.
What grade is available?
We offer this product in Technical Grade.
Can Molekula supply it in bulk?
Yes, we can supply sodium thiosulfate anhydrous in bulk quantities—please contact us for pricing and availability.
What documentation comes with the order?
Each order includes a Certificate of Analysis 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.