Butylated Hydroxytoluene USP/Ph.Eur 5KG Go Back


: 128-37-0

Molecular Formula

: C15H24O

Molecular Weight

: 220.35
Description: White, crystalline solid, having a faint, characteristic odor.
Solubility: Freely soluble in alcohol, in chloroform, in ether and in vegetable oils. Insoluble in water & in propylene glycol Very soluble in acetone.
Identification (by IR): IR Spectra of the sample should be concomitant with IR spectra of standard
Identification by chromatogram: The retention time of the BHT peak of the sample solution corresponds to that of the standard solution as obtained in the assay. The chromatographic profile of sample solution should exhibit only one major peak corresponding to the main compound.
Identification (By Freezing point): 69°C-70°C
Identification (By UV absorbance test): The solution should show an absorption maximum at 278 nm & the specific absorbance at the maximum should between 80 to 90.
Identification by Chemical test: A blue colour should develop
Appearance of solution: The solution is clear and not more intensely coloured than reference solution Y5 or BY5.
Assay: 99.0%-101.5%
Residue on ignition /Sulfated ash: Not more than 0.002%
Organic impurities : p-Cresol or m- cresol: NMT 0.1%
Organic impurities : 3-tert-Butyl-4Hydroxyanisole (BHA): NMT 0.1%
Organic impurities: 3,5-Di-tert-butyl-4-hydroxybenzoic acid: NMT 0.1%
Organic impurities : 2-tert-Butyl-4-methylphenol or 2-tert-butyl-5-methylphenol: NMT 0.1%
Organic impurities : 3,5-Di-tert-butyl-4-hydroxybenzaldehyde: NMT 0.1%
Organic impurities : 4,6-Di-tert-butyl-m-cresol: NMT 0.1%
Organic impurities : 2,6-Di-tert-butyl-phenol: NMT 0.1%
Organic impurities : Any unspecified impurity: NMT 0.1%
Organic impurities : total impurities: NMT 0.7%
Related substances (By TLC): 0.5% max.
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