3,5-Di-tert-butyl-4-hydroxybenzoic acid

Also known as: BHT-COOH, 3,5-bis(1,1-dimethylethyl)-4-hydroxybenzoic acid, 3,5-di-t-butyl-4-hydroxybenzoic acid, Dibutylhydroxybenzoic acid, 4-Carboxy-2,6-di-tert-butylphenol, 2,6-Di-tert-butyl-4-carboxyphenol, Thymol Impurity28

3,5-Di-tert-butyl-4-hydroxybenzoic acid (CAS 1421-49-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C15H22O3 and a molecular weight of 250.33300 g/mol. Key properties include a melting point of 206-209 °C(lit.), a boiling point of 340.6ºC at 760 mmHg, a density of 1.07 g/cm3 and a flash point of 174ºC. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1421-49-4
Jingsj CID: J-50087-8
Molecular Formula: C₁₅H₂₂O₃
Molecular Weight: 250.33300 g/mol
Category: Organic Acids
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	206-209 °C(lit.)
Boiling Point	340.6ºC at 760 mmHg
Density	1.07 g/cm3
Flash Point	174ºC
Exact Mass	250.15700
PSA	57.53000
LogP	3.68540
Vapor Pressure	3.28E-05mmHg at 25°C

GHS Safety & Compliance

IrritantSignal word: Warning

H302 — Harmful if swallowed
H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

Customs & Trade Information

HS Code	2918290000
Summary	HS: 2918290000 other carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) VAT:17.0% MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 3,5-Di-tert-butyl-4-hydroxybenzoic acid?

The CAS number of 3,5-Di-tert-butyl-4-hydroxybenzoic acid is 1421-49-4.

What are the molecular formula and molecular weight of 3,5-Di-tert-butyl-4-hydroxybenzoic acid?

3,5-Di-tert-butyl-4-hydroxybenzoic acid has molecular formula C15H22O3 and molecular weight 250.33300 g/mol.

Is 3,5-Di-tert-butyl-4-hydroxybenzoic acid hazardous?

3,5-Di-tert-butyl-4-hydroxybenzoic acid has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

What are the upstream and downstream products of 3,5-Di-tert-butyl-4-hydroxybenzoic acid?

For 3,5-Di-tert-butyl-4-hydroxybenzoic acid, Upstream Products: 2,6-Di-tert-butylphenol, Carbon dioxide, 3,5-Di-tert-butyl-4-hydroxybenzonitrile; Downstream Products: 2,6-Di-tert-butyl-p-benzoquinone, 3,3',5,5'-Tetra-tert-butyldiphenoquinone, 3,5-Di-tert-butyl-4-hydroxybenzyl alcohol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "3,5-Di-tert-butyl-4-hydroxybenzoic acid (CAS 1421-49-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-50087-8 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.