Sodium methylparaben

Details:

Chemical Name Sodium Methyl 4-Hydroxybenzoate Molecular Formula C8H7NaO3 Molecular Weight 174.13 Structural Formula CAS Number 5026-62-0 Packing 25 Kg, 20 kg(4 x 5 kg) The Shelf-life 3 years Storage conditions and precautions Store in a tightly closed containers. Use Antimicrobial Preservative NO. Test Specifications 1. Description White, crystalline powder, odourless or almost odourless; hygroscopic. 2. Solubility Freely soluble in water, sparingly soluble in ethanol (95%); practically insoluble in fixed oils. 3. Identification A. Dissolve 0.5 gm in 5 ml of water and acidify to litmus paper with hydrochloric acid; a white precipitate is produced. Wash the precipitate with water and dry. The infrared absorption spectrum of the precipitate, appendix 5.4 is concordant with the reference spectrum of Methyl Paraben or with the spectrum obtained from Methyl Paraben RS. \ B. The precipitate obtained in test A on ignition gives the reactions of sodium salts, appendix 3.1 4. PH Between 9.5 to 10.5, determined in a 0.1% w/v solution, appendix 8.11 5. Appearance of solution A 10% solution in water is clear, or not more opalescence than Opalescence standard OS1 prepared by 5.0 ml of Opalescence standard & 95 ml of water . 6. Chloride Not more than 330 ppm 7. Sulphate Not more than 0.12 % 8. Water Not more than 5.0 % 9. Assay on dried basis (As C8H7NaO3) Between 99.0% to 102