BHT

Description

BHT · CAS 128-37-0 · C15H24O. UNII 1P9D0Z171K. Boiling Point: 509 °F at 760 mmHg (NTP, 1992); Boiling Point: 265 °C; Boiling Point: 265.00 °C. @ 760.00 mm Hg.

Identification

CAS Registry Number	128-37-0
PubChem CID	31404
Molecular formula	C15H24O
IUPAC name	2,6-ditert-butyl-4-methylphenol
UNII (FDA)	1P9D0Z171K
FEMA number	2184

Computed Descriptors

Molecular Weight	220.35
XLogP3	5.3
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	2
Exact Mass	220.182715385
Monoisotopic Mass	220.182715385
Topological Polar Surface Area	20.2
Heavy Atom Count	16
Formal Charge	0

Physical & Chemical Properties

Boiling Point	509 °F at 760 mmHg (NTP, 1992)
Boiling Point	265 °C
Boiling Point	265.00 °C. @ 760.00 mm Hg
Boiling Point	509 °F
Melting Point	156 to 160 °F (NTP, 1992)
Melting Point	70 °C
Melting Point	71 °C
Melting Point	158 °F
Flash Point	260 °F (NTP, 1992)
Flash Point	260 °F

Physical description & handling notes

• Butylated hydroxytoluene is a white crystalline solid. (NTP, 1992)
• Other Solid; Dry Powder; CBI; Large Crystals; Liquid; Large Crystals; Liquid; Other Solid
• White, crystalline or flaked solid, odourless or having a characteristic faint aromatic odour
• White to pale-yellow, crystalline solid with a slight, phenolic odor; (food preservative); [NIOSH]
• Solid
• COLOURLESS-TO-PALE-YELLOW CRYSTALS OR POWDER.

Regulatory Status

Regulatory & Food Contact	FDA Substance added to food: ANTIOXIDANT, FLAVOR ENHANCER, FLAVORING AGENT OR ADJUVANT FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS ANTIOXIDANT: Food Additives Toasted Cereal BUTYLATED HYDROXYTOLUENE JECFA ADI: 0-0.3 mg/kg bw
GHS notification summary	4.6% (306 / 6619)

GHS Hazard Classification

GHS notification summary	4.6% (306 / 6619)
Reported hazard statements	H400 (42.6%), H410 (84.3%), H320, H361, H370, H373, H302, H313

Documented Uses

• Used as an anti-oxidant in gasoline, oils, waxes, rubbers, paints, and plastics; purified forms are used as anti-oxidants in foods; [ACGIH] Used as an anti-skinning agent in paints and inks; [Merck Index] BHT is a preservative and anti-oxidant used in food, cosmetics, and medications. Industrial applications include: animal feeds, jet fuels, rubber, plastics, paints, and glues. [Marks, p. 138-9]
• Painting (Pigments, Binders, and Biocides) [Category: Paint]
• Working with Glues and Adhesives [Category: Other]
• Farming (Feed Additives) [Category: Industry]
• Table: Reported uses (ppm): (Flavor and Extract Manufacturers' Association, 1994) [Table#2880]
• Antioxidant for food, animal feed, petroleum products, synthetic rubbers, plastics, animal and vegetable oils, soaps. Antiiskinning agent in paints and inks

Synonyms

2,6-Di-tert-butyl-4-methylphenol; 128-37-0; Butylhydroxytoluene; 2,6-Di-tert-butyl-p-cresol; 2,6-Di-t-butyl-4-methylphenol; Ionol; Stavox; DBPC; Impruvol; Dalpac; Deenax; Ionole; Kerabit; Topanol; Vianol; Ionol CP

Frequently Asked Questions

What are the CAS number and molecular formula of BHT?

CAS 128-37-0; molecular formula C15H24O; molecular weight — g/mol.

What other names is BHT known by?

2,6-Di-tert-butyl-4-methylphenol, 128-37-0, Butylhydroxytoluene, 2,6-Di-tert-butyl-p-cresol, 2,6-Di-t-butyl-4-methylphenol, Ionol.

What is the regulatory status of BHT?

Documented regulatory listings: FDA Substance added to food: ANTIOXIDANT, FLAVOR ENHANCER, FLAVORING AGENT OR ADJUVANT; FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS; ANTIOXIDANT: Food Additives.

Is BHT classified as hazardous?

4.6% of GHS notifications report no hazard classification (306 of 6619).

What are the key physical properties of BHT?

Boiling Point: 509 °F at 760 mmHg (NTP, 1992); Boiling Point: 265 °C; Boiling Point: 265.00 °C. @ 760.00 mm Hg; Boiling Point: 509 °F.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.