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| like or containing an alkali, which neutralize acids to form salts and turn red litmus paper blue, or having a pH value greater than 7 |
| a chemical that consumes or renders inactive the impurities in a mixture |
chromogen chro·mo·gen (krō'mə-jən)
n.
A substance that lacks definite color but may be transformed into a pigment.
A strongly pigment-generating or pigmented organelle, organ, or microorganism.