Potassium sodium tartrate tetrahydrate, Pharmpur®, Ph Eur, BP, USP

- Synonyms: Sodium potassium tartrate, Tartaric acid potassium sodium salt
- C4H4KNaO6·4H2O
- M = 282,23 g/mol
- CAS [6381-59-5]
- EINECS-No.: 205-698-2
- Solub. in water: (20 ºC): 630 g/l
- Melting point: 70 - 80 ºC
- Tariff number: 2918 13 00 00
- Applications: analytical chemistry, laboratory reagent, in food industry, in fertilizer compositions, in the electronic industry.

SPECIFICATIONS

dried sample): 99,0 - 101,0 %
Identification A (USP): passes test
Identification B (USP): passes test
Identification tartrate: passes test
Identification sodium: passes test
Identification potassium: passes test
appearance of solution: clear and colourless
acidity or alkalinity: passes test
alkalinity : passes test
specific rotation ([a]20/ D; c = 5, H2O on dried sample): + 28,0 º - + 30,0 º
chlorides (Cl): max. 100 ppm:
sulfates (SO4): max. 50 ppm
ammonium (NH4): max. 0,002 %
barium and oxalates: passes test
calcium (Ca): max. 200 ppm
water (K.F.): 24,0 - 26,5 %