Transcription of SILICA, COLLOIDAL ANHYDROUS SILICA, …
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SILICA, COLLOIDAL ANHYDROUS SILICA, …
EUROPEAN PHARMACOPOEIA , COLLOIDAL hydrated01/2008:0434corrected , COLLOIDAL ANHYDROUSS ilica colloidalis [7631-86-9]DEFINITIONC olloidal ANHYDROUS silica contains not less than percent and not more than the equivalent of per cent ofSiO2, determined on the ignited light, fine, white or almost white, amorphous powder, witha particle size of about 15 nm, practically insoluble in waterand in mineral acids except hydrofluoric acid. It dissolves inhot solutions of alkali 20 mg gives the reaction of silicates ( ).TESTSpH( ). Shake g with 30 ml ofcarbon dioxide-freewater R. The pH of the suspension is to ( ). acid Rand 30 ml ofwater Rand heat on a water-bathfor 15 min, shaking frequently.
EUROPEAN PHARMACOPOEIA 6.0 Silica, colloidal hydrated 01/2008:0434 corrected 6.0 SILICA, COLLOIDAL ANHYDROUS Silica colloidalis anhydrica SiO2 Mr 60.1 [7631-86-9] DEFINITION Colloidal anhydrous silica contains not less than 99.0 per
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