Does formalin always have 37% formaldehyde?

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? 

Comments

  • chemicalmattchemicalmatt Member, Professional Chemist
    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. 
  • 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
  • PhilGeisPhilGeis Member, Professional formulator
    No - it's also supplied at ~10%
  • PhilGeis said:
    No - it's also supplied at ~10%
    Thanks.

    This should i definitely ask and find out from supplier. 
  • PhilGeisPhilGeis Member, Professional formulator
    It'll be on msds
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