Molekula
Potassium sodium tartrate tetrahydrate (Rochelle Salt) (RD.)
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Certificate of Analysis with every batch
Potassium sodium tartrate tetrahydrate, also known as Rochelle Salt, is a double salt of potassium and sodium tartrate widely used in biochemical research, pharmaceuticals, and as a buffering agent in analytical chemistry. It is also employed in the production of baking powder and as a food additive (E337). This chemical has a CAS number of 6381-59-5, with the molecular formula C4H4KNaO6 and a molecular weight of 210.16. It can be stored safely at ambient conditions and carries no signal word for hazard classification. Molekula supplies Potassium sodium tartrate tetrahydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Potassium sodium tartrate tetrahydrate, also known as Rochelle Salt, is a double salt of potassium and sodium tartrate widely used in biochemical research, pharmaceuticals, and as a buffering agent in analytical chemistry. It is also employed in the production of baking powder and as a food additive (E337). This chemical has a CAS number of 6381-59-5, with the molecular formula C4H4KNaO6 and a molecular weight of 210.16. It can be stored safely at ambient conditions and carries no signal word for hazard classification. Molekula supplies Potassium sodium tartrate tetrahydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Pricing & pack sizes
Specifications
| Property | Value |
|---|---|
| Appearance | White to off white powder |
| Heavy metals | ≤5ppm |
| Identification | Conforms to reference |
| Loss on Drying | 21.0 - 26.0% at 150°C |
| Chloride (Cl-) | ≤100ppm |
| Assay | 99.5 - 102.0% |
| Sieve Analysis | ≥80% passing 80 mesh sieve (0.2)mm |
| Iron (Fe) | ≤5ppm |
| pH (1% aq. sol.) | 6.5 - 8.5 |
| Lead (Pb) | ≤2ppm |
| Mercury (Hg) | ≤1ppm |
| Arsenic (As) | ≤3ppm |
| Sulphates (SO4)(2-) | ≤100ppm |
| Oxalate (Oxalic acid) | ≤100ppm |
| Ammonia (NH3) | ≤7ppm |
| Sieve analysis 0.5mm | Retained on 0.5mm -0% |
| Sieve analysis 0.315 mm | Retained on 0.315 mm ≤15% |
| Sieve analysis 0.063mm | Passing 0.063mm ≤48% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90037394 |
| 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
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
No alternate names recorded for this product.
Frequently asked questions
What is potassium sodium tartrate tetrahydrate (Rochelle Salt) commonly used for?
It is primarily used as a buffering agent in food (e.g., baking powder), a laboratory reagent for pH control, and in the production of tartrates in pharmaceuticals.
What is the chemical formula and molecular weight of Rochelle Salt?
The chemical formula is **C₄H₄KNaO₆**, and the molecular weight is **210.16 g/mol**.
How should Rochelle Salt be stored?
Store at **ambient temperature** in a dry, well-ventilated area, away from moisture and incompatible substances.
What grades or purities of Rochelle Salt does Molekula supply?
Molekula supplies **analytical reagent (AR) grade** and **food-grade** Rochelle Salt, depending on application requirements.
Can Molekula supply Rochelle Salt in bulk quantities?
Yes, Molekula can supply Rochelle Salt in **bulk quantities** (minimum order quantities may apply—please inquire for details).
What documentation comes with an order of Rochelle Salt?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
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