C6H14O2 118.17

2,4-Pentanediol,2-methyl-,(±)-.
(±)-2-Methyl-2,4-pentanediol [107-41-5].

Packaging and storage— Preserve in tight containers.

USP Reference standards á11ñ— USP Hexylene Glycol RS.

Identification,Infrared Absorption á197Fñ,on undried specimen.

Specific gravity á841ñ: between 0.917and 0.923.

Refractive index á831ñ: between 1.424and 1.430.

Acidity— Mix 1mLof phenolphthalein TSwith 50mLof water,and add 0.1Nsodium hydroxide until the solution remains pink for 30seconds.Add 10mLof Hexylene Glycol,accurately measured,and titrate with 0.10Nsodium hydroxide until the original pink color returns and remains for 30seconds:not more than 0.20mLof 0.10Nsodium hydroxide is required.

Water,Method Iá921ñ: not more than 0.5%.

Expert Committee:(EMC)Excipients:Monograph Content

USP28–NF23Page 3016

Phone Number:1-301-816-8262