3,5-Diiodosalicylic acid

3,5-二碘水杨酸

Also known as: 2-Hydroxy-3,5-diiodobenzoic acid, 2-Hydroxy-3,5-diiodobenzenecarboxylic acid, 2-Hydroxy-3,5-diiodobenzoate, 3,5-Diiodo-2-hydroxybenzoic acid, 3,5-Diiodosalicylic acid, Diiodosalicylic acid, Sanoform, Diosal, DISA

3,5-Diiodosalicylic acid (CAS 133-91-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H4I2O3 and a molecular weight of 389.914 g/mol. It is also known as 2-Hydroxy-3,5-diiodobenzoic acid, 2-Hydroxy-3,5-diiodobenzenecarboxylic acid and 2-Hydroxy-3,5-diiodobenzoate. Key properties include a melting point of 220-230 °C (dec.)(lit.), a boiling point of 380.8±42.0 °C at 760 mmHg, a density of 2.7±0.1 g/cm3 and a flash point of 184.1±27.9 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
133-91-5
Jingsj CID
J-1418403-1
Molecular Formula
C7H4I2O3
Chinese Name
3,5-二碘水杨酸
Molecular Weight
389.914 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point220-230 °C (dec.)(lit.)
Boiling Point380.8±42.0 °C at 760 mmHg
Density2.7±0.1 g/cm3
Flash Point184.1±27.9 °C

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of 3,5-Diiodosalicylic acid?

The CAS number of 3,5-Diiodosalicylic acid is 133-91-5.

What are the molecular formula and molecular weight of 3,5-Diiodosalicylic acid?

3,5-Diiodosalicylic acid has molecular formula C7H4I2O3 and molecular weight 389.914 g/mol.

Is 3,5-Diiodosalicylic acid hazardous?

3,5-Diiodosalicylic acid has GHS signal word Warning.

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

Last updated:

How to cite: Jingsj. "3,5-Diiodosalicylic acid (CAS 133-91-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1418403-1 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.