333-49-3 2-Thiocytosine 4-Aminopyrimidine-2-thiol 2(1H)-Pyrimidinethione, 4-amino- 2(1H)-Pyrimidinethione, 6-amino- AI3-52256 4-Amino-2(1H)-pyrimidinethione Cytosine, thio- Cytosine, 2-thio- EINECS 206-374-3 NSC 211571 2(1H)-Pyrimidinone, 4-aminothio- Thiocytosine NSC 45755 CAS 333-49-3

Purity 97%+In StockPharmaceutical Standards
CAS No.333-49-3
Molecular FormulaC4H5N3S
Molecular Weight127.17 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

333-49-3 2-Thiocytosine 4-Aminopyrimidine-2-thiol 2(1H)-Pyrimidinethione, 4-amino- 2(1H)-Pyrimidinethione, 6-amino- AI3-52256 4-Amino-2(1H)-pyrimidinethione Cytosine, thio- Cytosine, 2-thio- EINECS 206-374-3 NSC 211571 2(1H)-Pyrimidinone, 4-aminothio- Thiocytosine NSC 45755 CAS 333-49-3 chemical structure

Description

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

CATO supplies 333-49-3 2-Thiocytosine 4-Aminopyrimidine-2-thiol 2(1H)-Pyrimidinethione, 4-amino- 2(1H)-Pyrimidinethione, 6-amino- AI3-52256 4-Amino-2(1H)-pyrimidinethione Cytosine, thio- Cytosine, 2-thio- EINECS 206-374-3 NSC 211571 2(1H)-Pyrimidinone, 4-aminothio- Thiocytosine NSC 45755 (CAS 333-49-3), a certified reference material (molecular formula C4H5N3S, MW 127.17 g/mol) for analytical method development and quality control.

Structurally, 333-49-3 2-Thiocytosine 4-Aminopyrimidine-2-thiol 2(1H)-Pyrimidinethione, 4-amino- 2(1H)-Pyrimidinethione, 6-amino- AI3-52256 4-Amino-2(1H)-pyrimidinethione Cytosine, thio- Cytosine, 2-thio- EINECS 206-374-3 NSC 211571 2(1H)-Pyrimidinone, 4-aminothio- Thiocytosine NSC 45755 (C4H5N3S) contains a nitrile group, sulfur-containing functionality. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 127.17 g/mol, it falls into the low-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC4H5N3S
Molecular Weight127.17 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1957
Nitrogen Atoms3
Sulfur Atoms1

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