3,5-Diiodosalicylic acid
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. 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. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H312 — Harmful in contact with skin and H315 — Causes skin irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 133-91-5
- Jingsj CID
- J-1418403-3
- Molecular Formula
- C7H4I2O3
- Molecular Weight
- 389.914 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 220-230 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 380.8±42.0 °C at 760 mmHg |
| Density | 2.7±0.1 g/cm3 |
| Flash Point | 184.1±27.9 °C |
| Exact Mass | 389.824951 |
| PSA | 57.53000 |
| LogP | 4.56 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.784 |
| Storage Conditions | -20°C |
| Additional Property | 0.02 g/100mL (25 ºC) |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H312 — Harmful in contact with skin
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H332 — Harmful if inhaled
- 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-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 and hazard statements H302 — Harmful if swallowed; H312 — Harmful in contact with skin; H315 — Causes skin irritation.
What are the upstream and downstream products of 3,5-Diiodosalicylic acid?
For 3,5-Diiodosalicylic acid, Upstream Products: Salicylic acid, 5-Iodosalicylic acid, 3,5-Diiodosalicylaldehyde; Downstream Products: 3,5-Diiodosalicyloyl chloride, 2,4,6-Triiodophenol, Methyl 5-iodo-2-methoxybenzoate.
Data compiled from public chemical databases such as PubChem 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-1418403-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.