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2-(2-Aminothiazol-4-yl)-2-hydroxyiminoacetic acid

Also known as: HATA, ATHAA, (Z)-2-Hydroxyimino-2-(2-aminothiazol-4-yl)acetic acid, (Z)-2-(2-Aminothiazol-4-yl)-2-(hydroxyimino)acetic acid, 2-(2-Amino-4-thiazolyl)-2-hydroxyiminoacetic acid, 2-Amino-alpha-(hydroxyimino)-4-thiazoleacetic acid, MFCD00062754

2-(2-Aminothiazol-4-yl)-2-hydroxyiminoacetic acid (CAS 66338-96-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H5N3O3S and a molecular weight of 187.17600 g/mol. Key properties include a melting point of 190-192ºC, a boiling point of 539.4ºC at 760 mmHg and a density of 1.92 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
66338-96-3
Jingsj CID
J-908260-4
Molecular Formula
C5H5N3O3S
Molecular Weight
187.17600 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026
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Physicochemical Properties

Melting Point190-192ºC
Boiling Point539.4ºC at 760 mmHg
Density1.92 g/cm3
Exact Mass187.00500
PSA137.04000
LogP0.56940
Refractive Index1.798
Storage Conditions2-8°C

Frequently Asked Questions

What is the CAS number of 2-(2-Aminothiazol-4-yl)-2-hydroxyiminoacetic acid?

The CAS number of 2-(2-Aminothiazol-4-yl)-2-hydroxyiminoacetic acid is 66338-96-3.

What are the molecular formula and molecular weight of 2-(2-Aminothiazol-4-yl)-2-hydroxyiminoacetic acid?

2-(2-Aminothiazol-4-yl)-2-hydroxyiminoacetic acid has molecular formula C5H5N3O3S and molecular weight 187.17600 g/mol.

What are the upstream and downstream products of 2-(2-Aminothiazol-4-yl)-2-hydroxyiminoacetic acid?

For 2-(2-Aminothiazol-4-yl)-2-hydroxyiminoacetic acid, Upstream Products: Ethyl 2-(2-aminothiazole-4-yl)-2-hydroxyiminoacetate; Downstream Products: (Z)-2-(2-Tritylaminothiazol-4-yl)-2-trityloxyiminoacetic acid.

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

Last updated:

How to cite: Jingsj. "2-(2-Aminothiazol-4-yl)-2-hydroxyiminoacetic acid (CAS 66338-96-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-908260-4 (accessed 2026-11-09).

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