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Acid Red 18
Red to dark red powder, the aqueous solution is red, odorless. Easily soluble in water, soluble in glycerin, slightly soluble in ethanol, and insoluble in oil. It has good light resistance and acid resistance, stable to citric acid and tartaric acid, poor bacterial resistance, and poor heat resistance and reduction resistance. Turns brown in alkaline solution. The maximum absorption wavelength is (508±2) nm. Rat oral LD50 is greater than 8000mg/kg, mouse oral LD50 is 19300mg/kg, ADI0-4mg/kg (FAO/WHO, 1994). Carmine aluminum lake is red fine powder, odorless. It has better light resistance and heat resistance than carmine, and is insoluble in water and organic solvents. Used as food coloring agent, medicine and cosmetics coloring agent.
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