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di-Sodium tetraborate decahydrate, Pharmpur®, Ph Eur, BP, NF

- Synonyms: Borax, Sodium biborate decahydrate, Sodium borate decahydrater- Na2B4O7·10H2Or- M = 381,37 g/molr- CAS [1303-96-4]r- EINECS-No.: 215-540-4r- Solub. in water: (20 ºC): 51,4 g/lr- Melting point: 75 ºCr- Boiling point: 1575 ºC (anhydrous)r- Vapour pressure: (20 ºC) 0,213 hPar- LD 50 (oral, rat): 2660 mg/kgr- GHS-signal word: Dangerr- GHS-H sentences: H319 - H360FDr- GHS-P sentences: P280 - P305+P351+P338 - P308+P313 - P337+P313 - P405 - P501ar- Tariff number: 2840 19 90 00r- Applications: reference material, for calibrating pH-meters, for pharmaceutical use.rrSPECIFICATIONSrassay (acidimetric): 99,0 - 103,0 %rIdentification sodium: passes testrIdentification borate: passes testrIdentification A (EP): passes testridentification B (EP): passes testrappearance of solution: clear and colourlessrpH (4 %, H2O): 9,0 - 9,6rcarbonate, bicarbonate: passes testrsulfates (SO4): max. 50 ppmrammonium (NH4): max. 10 ppmrarsenic (As): max. 5 ppmrcalcium (Ca): max. 100 ppm: r