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*This document is like a lab demo—an example Certificate of Analysis (COA) that showcases what a COA looks like but may not match the latest batch in all its glory. Think of it as a chemistry experiment: close, but not quite the final reaction!
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Bulk Quote| hazards summary | General term for a group of compounds with varying quantities of sodium oxide (Na2-O) and silica (Si2-O). Aqueous solutions are characterized by the weight ratio of silica to sodium oxide, usually 1.6 to 3.8. Solutions are strongly alkaline and corrosive. A strong skin and eye irritant. Toxic by ingestion at high doses. A medium strong base in solution. 25-50% Aqueous solution: Aerosol is a skin, eye, and respiratory tract irritant. Corrosive to rabbit skin (when tested at 53.5% molar ratio of 1.6 and 82% molar ratio of 2.4). Sodium metasilicate was not sensitizing in a local lymph node assay study of mice. Similar uses and adverse effects are expected from the hydrous and anhydrous forms (Sodium metasilicate pentahydrate, Sodium metasilicate nonahydrate, Sodium metasilicate, Sodium silicate, and Potassium silicate). The main hazard of soluble silicates is their alkalinity and potentially corrosive effects on metal and tissue. A corrosive substance that can cause injury to the skin, eyes, and respiratory tract. A strong skin, eye, and mucous membrane irritant. Causes burns. A respiratory tract irritant. In high-dose, 4-week feeding studies of dogs and rats, polydipsia and polyuria were observed. Dogs but not rats had renal lesions. Oral LD50 (rat) = 1280 mg/kg (10% solution). pH of 1% solution = 13. No reports on reproductive effects. Corrosive to moistened rabbit skin. Not sensitizing in a local lymph node assay study of mice. Similar uses and adverse effects are expected from the hydrous and anhydrous forms (Sodium metasilicate pentahydrate, Sodium metasilicate nonahydrate, Sodium metasilicate, Sodium silicate, and Potassium silicate). One case of occupational contact urticaria reported from sodium silicate. A severe skin irritant. Human ingestion of 1 mL/kg causes changes in tubules (including acute renal failure and necrosis), hematuria, and nausea or vomiting. Causes burns. Inhalation may cause corrosive injuries to upper respiratory tract and lungs. |
