Bister black liquid or solid, there are special sweet fragrant smell and happy burnt bitter flavor; soluble in water, insoluble common organic solvent or grease. The aqueous solution is reddish brown, not muddy or precipitating; stable to light and heat. Caramel has the characteristic of colloid, the equipotentiality ,its PH index is different when using different manufacturing approach or in different products, usually about3-4.5.
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