BHT (FCC)
CAS No. 128-37-0
BHT (Butylated Hydroxytoluene) FCC is a food grade antioxidant used to delay the oxidative rancidity of oils and fats and thereby extend the shelf life of both food and cosmetics.
To use in soapmaking, heat a portion of the oil(s) to be treated to 165°F and remove from the heat source. Add the BHT to the heated oil and stir until fully dissolved and well mixed. Add the treated oil to the balance of the oil(s) and stir well. Usage rate for BHT is .01% - .1% w/w (by weight) with .05% typically used for soapmaking oils. When used in soapmaking, BHT is best used in combination with tetrasodium EDTA (which is added to the water). Tetrasodium EDTA chelates (binds) the metal ions that may be present, working synergistically with BHT. The addition of tetrasodium EDTA can also prevent the yellowing of soap which can occur if BHT is used alone. BHT is most effective in preventing rancidity of animal fats and is less effective in vegetable oils.
In perfumery and cosmetic use, BHT is added to the oil phase of cosmetic formulations or the alcohol for perfumes. Typical usage rates are 0.05 - 0.1%.
BHT is classified as GRAS (generally regarded as safe) by the US FDA. It is generally recognized as safe for use in food when the total content of antioxidants does not exceed 0.02% of the fat or oil content of food, provided the substance is used in accordance with good manufacturing practice. (21CFR182.3173).
CAUTION: BHT is combustible. Do not use near open flames. Also, use breathing protection, safety goggle and protective gloves and clothing when handling the substance. BHT is harmful to aquatic animals - do not release into the environment.
Recommended Usage Rate: 0.01- 0.1%
Appearance: White crystalline powder with a characteristic aromatic odor
Solubility: Soluble in oil and alcohol, insoluble in water and propylene glycol
Melt Point: 71°C / 159.8°F
Flash Point: 127°C / 260.6°F
INCI: BHT
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