3,4-Dimethylbenzaldehyde

Also known as: 3,4-dimethylbenzaldehyde, 34 DMB, o-xylene-4-carboxaldehyde, Benzaldehyde, 3,4-dimethyl-, 3,4-dimethyl-benzaldehyde, 4-Formyl-o-xylene, MFCD00016612

3,4-Dimethylbenzaldehyde (CAS 5973-71-7) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C9H10O and a molecular weight of 134.175 g/mol. Key properties include a melting point of 225-226ºC, a boiling point of 225.3±9.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 97.6±5.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5973-71-7
Jingsj CID: J-1498363-2
Molecular Formula: C₉H₁₀O
Molecular Weight: 134.175 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	225-226ºC
Boiling Point	225.3±9.0 °C at 760 mmHg
Density	1.0±0.1 g/cm3
Flash Point	97.6±5.0 °C
Exact Mass	134.073166
PSA	17.07000
LogP	2.56
Vapor Pressure	0.1±0.4 mmHg at 25°C
Refractive Index	1.551

Customs & Trade Information

HS Code	2912299000
Summary	2912299000. other cyclic aldehydes without other oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 3,4-Dimethylbenzaldehyde?

The CAS number of 3,4-Dimethylbenzaldehyde is 5973-71-7.

What are the molecular formula and molecular weight of 3,4-Dimethylbenzaldehyde?

3,4-Dimethylbenzaldehyde has molecular formula C9H10O and molecular weight 134.175 g/mol.

What are the upstream and downstream products of 3,4-Dimethylbenzaldehyde?

For 3,4-Dimethylbenzaldehyde, Upstream Products: 4-Iodo-1,2-dimethylbenzene, o-xylene, N,N-Diformylformamide; Downstream Products: Trimellitic acid, 3,4-dimethylbenzyl alcohol, 1,3:2,4-Bis(3,4-dimethylobenzylideno) sorbitol.

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. "3,4-Dimethylbenzaldehyde (CAS 5973-71-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1498363-2 (accessed 2026-11-09).

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