Molekula
Potassium sodium tartrate tetrahydrate (Rochelle Salt)
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
Potassium sodium tartrate tetrahydrate, also called Rochelle Salt, is a double salt of potassium and sodium tartrate widely used in chemical analysis, pharmaceuticals, and as a complexing agent in Fehling's solution and biuret reagent. This white crystalline powder has the chemical formula C4H4KNaO6, a molecular weight of 210.16 g/mol, and requires no special storage conditions under ambient temperatures. It carries no signal word for hazard classification, ensuring safe handling. Molekula supplies Potassium sodium tartrate tetrahydrate 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.
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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.
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1 kg — $73.80 per pack
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Specifications
| Property | Value |
|---|---|
| Appearance | Off-white to white crystals |
| Water | 24.0 - 26.0% |
| Heavy metals | ≤ 0.001% |
| pH | 6.5 - 8.5 (1% sol.) |
| Chloride (Cl-) | ≤ 100ppm |
| Assay | 99.0-102.0% |
| Iron (Fe) | ≤ 10ppm |
| Lead (Pb) | ≤ 2ppm |
| Mercury (Hg) | ≤ 1ppm |
| Arsenic (As) | ≤ 3ppm |
| Sulphates (SO4)(2-) | ≤ 0.05% |
| Identification (RAMAN) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 11512541 |
| CAS Number | 6381-59-5 |
| Molecular Formula | C4H4KNaO6 |
| Molecular Weight | 210.16 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2918.13.3000 |
| Tariff Code | 29181300 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
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.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is potassium sodium tartrate tetrahydrate (Rochelle Salt) commonly used for?
Rochelle Salt is used as a complexing agent in Fehling's solution and biuret reagent, and as a reagent in analytical chemistry for titrations and pH buffering.
What is the molecular formula and molecular weight of Rochelle Salt?
The molecular formula is C₄H₄KNaO₆, and the molecular weight is 210.16 g/mol.
How should Rochelle Salt be stored?
Store Rochelle Salt at ambient temperature in a cool, dry place, away from moisture and strong oxidizing agents.
What grades of Rochelle Salt does Molekula supply?
Molekula supplies ACS reagent grade and technical grade Rochelle Salt, ensuring high purity and consistency for various applications.
Can Molekula supply Rochelle Salt in bulk quantities?
Yes, Molekula can supply Rochelle Salt in bulk, with quantities tailored to meet your production or research needs.
What documentation comes with an order of Rochelle Salt?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a product specification sheet for reference.
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.