S-Ethyl N-Phenylisothiourea CAS 19801-34-4

Purity 97%+In StockPharmaceutical Standards
CAS No.19801-34-4
Molecular FormulaC9H12N2S
Molecular Weight180.27 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

S-Ethyl N-Phenylisothiourea CAS 19801-34-4 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.

S-Ethyl N-Phenylisothiourea (CAS 19801-34-4), molecular formula C9H12N2S and molecular weight 180.27 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of S-Ethyl N-Phenylisothiourea (C9H12N2S) is characterized by a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

As a certified reference material (CRM), S-Ethyl N-Phenylisothiourea meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC9H12N2S
Molecular Weight180.27 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)5.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1962
Nitrogen Atoms2
Sulfur Atoms1

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