Multiple choice

Which among the following selenium compounds can cause discolouration of hairs?

  1. Selenium dioxide

  2. Selenium disulphide

  3. Selenium trioxide

  4. Selenoyl fluoride
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Selenium disulphide has a composition that approximates to SeS2 and is sometimes called selenium sulphide. However, as used in proprietary formulations, it is not a pure chemical compound but is a mixture where the overall Se:S ratio is 1:2.  It can cause discolouration of the hair and alter the colour of hair dyes. It may also discolour metallic jewellery.

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