English En

Boric acid, Pharmpur®, Ph Eur, BP, NF

- Synonyms: Orthoboric acid
- H3BO3
- M = 61,84 g/mol
- CAS [10043-35-3]
- EINECS-No.: 233-139-2
- Solub. in water: (20 ºC): 46,5 g/l
- Melting point: 185 ºC (decomposes)
- Vapour pressure: (20 ºC) 2,7 hPa
- LD 50 (oral, rat): 2660 mg/kg
- EC-Index-No.: 005-007-00-2
- GHS-signal word: Danger
- GHS-H sentences: H360FD
- GHS-P sentences: P261 - P280 - P304+P340 - P312 - P405 - P501a
- Tariff number: 2810 00 90 00
- Applications: in building materials, in porcelain industry, cosmetics, manufacture of dyes, photography, analytical chemistry.

SPECIFICATIONS
assay (acidimetric): 99,0 - 100,5 %
assay (acidimetric, referred to dried sample): 99,5 - 100,5 %
Identification A (EP): passes test
Identification B (EP): passes test
Identification A (USP): passes test
appearance of solution: clear and colourless
completeness of solution: passes test
pH (3,3 %, H2O): 3,8 - 4,8
solubility in ethanol 96%: passes test
solubility in alcohol: passes test
sulfates (SO4): max. 450 ppm
organic matter: passes test
loss on drying (over silica gel): max. 0,5 %