Home Cosmetic Science Talk Formulating Does formalin always have 37% formaldehyde?

  • Does formalin always have 37% formaldehyde?

    Posted by abdullah on November 30, 2021 at 2:27 am

    I did purchase some formalin yesterday. The smell was very awful. As the seller didn’t know the percentage of formaldehyde in it, i wanted to know, does formalin always has 37% formaldehyde or there is different variations? 

    PhilGeis replied 2 years, 2 months ago 3 Members · 5 Replies
  • 5 Replies
  • chemicalmatt

    Member
    November 30, 2021 at 6:55 pm

    That is the standard commercial concentration, determined many years ago by partial pressure equilibria calculations of volatiles. Same holds true with standard ammonia concentration (26Be if I recall?), etc., etc. 

  • abdullah

    Member
    December 1, 2021 at 1:19 am

    That is the standard commercial concentration, determined many years ago by partial pressure equilibria calculations of volatiles. Same holds true with standard ammonia concentration (26Be if I recall?), etc., etc. 

    Thanks

  • PhilGeis

    Member
    December 1, 2021 at 12:12 pm

    No - it’s also supplied at ~10%

  • abdullah

    Member
    December 1, 2021 at 2:23 pm

    PhilGeis said:

    No - it’s also supplied at ~10%

    Thanks.

    This should i definitely ask and find out from supplier. 

  • PhilGeis

    Member
    December 1, 2021 at 2:30 pm

    It’ll be on msds

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