Metrizoic acid

甲泛影酸

Also known as: Metrizoate, Triosil-280, 3-acetamido-2,4,6-triiodo-5-(N-methylacetamido)benzoic acid, 3-acetamido-5-(N-methylacetamido)-2,4,6-triiodobenzoic acid, 3-acetylamino-5-[acetyl(methyl)amino]-2,4,6-triiodobenzoic acid, 3,5-diacetamido-N-methyl-2,4,6-triiodobenzoic acid

Metrizoic acid (CAS 1949-45-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H11I3N2O4 and a molecular weight of 627.94000 g/mol. It is also known as Metrizoate, Triosil-280 and 3-acetamido-2,4,6-triiodo-5-(N-methylacetamido)benzoic acid. Key properties include a boiling point of 678.8ºC at 760mmHg, a density of 2.483g/cm3 and a flash point of 364.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1949-45-7
Jingsj CID: J-1234-0
Molecular Formula: C₁₂H₁₁I₃N₂O₄
Chinese Name: 甲泛影酸
Molecular Weight: 627.94000 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	678.8ºC at 760mmHg
Density	2.483g/cm3
Flash Point	364.3ºC
Exact Mass	627.78500
PSA	86.71000
LogP	3.21270
Vapor Pressure	2.35E-19mmHg at 25°C
Refractive Index	1.77

Activity & Biological Data

Additional Information	[1]. Vik-Mo H, et al. Hemodynamic and electrocardiographic consequences of high- and low-osmolality contrast agents for left ventricular angiography. Cathet Cardiovasc Diagn. 1988;14(3):143-9. [2]. Sortland O, et al. Iopentol in urography. A clinical comparison between iopentol and metrizoate includingdelayed reactions. Acta Radiol. 1992 Jul;33(4):368-73. [3]. Holtås S,et al. Contrast enhanced brain CT. Comparison between iohexol and metrizoate. Neuroradiology. 1983;24(4):213-5.

Additional Information

[1]. Vik-Mo H, et al. Hemodynamic and electrocardiographic consequences of high- and low-osmolality contrast agents for left ventricular angiography. Cathet Cardiovasc Diagn. 1988;14(3):143-9. [2]. Sortland O, et al. Iopentol in urography. A clinical comparison between iopentol and metrizoate includingdelayed reactions. Acta Radiol. 1992 Jul;33(4):368-73. [3]. Holtås S,et al. Contrast enhanced brain CT. Comparison between iohexol and metrizoate. Neuroradiology. 1983;24(4):213-5.

Customs & Trade Information

HS Code	2924299090
Summary	2924299090. other cyclic amides (including cyclic carbamates) and their derivatives; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Metrizoic acid?

The CAS number of Metrizoic acid is 1949-45-7.

What are the molecular formula and molecular weight of Metrizoic acid?

Metrizoic acid has molecular formula C12H11I3N2O4 and molecular weight 627.94000 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Metrizoic acid (CAS 1949-45-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1234-0 (accessed 2026-10-28).

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