An aqueous solution of formaldehyde is commercially available as:
A
vinegar
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B
formalin
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C
sirka
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D
none of the above
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Solution
The correct option is B formalin Aqueous solution of formaldehyde is commercially available as formalin. A saturated water solution of about 40% formaldehyde by volume or 37% by mass is called 100% formalin. A small amount of stabilizer such as methanol is added to supress oxidation and polymerisation. A typical commmercial grade formalin may contain 10-12% methanol.