Description

Methylthiouracil CAS NO 91795-77-6 is a sulfur-containing heterocyclic organic compound belonging to the thiouracil class. This compound is of significant interest in pharmaceutical research and development, particularly as a foundational intermediate for synthesizing more complex active pharmaceutical ingredients (APIs). It serves a critical role for manufacturers and R&D laboratories in the life sciences sector requiring high-purity, reliable chemical building blocks for therapeutic applications.

Application

• Pharmaceutical Intermediate: A key starting material or intermediate in the synthesis of more complex thiouracil derivatives and related drug candidates.
• Research & Development: Utilized in biochemical and pharmacological research to study structure-activity relationships and develop new therapeutic agents.
• Reference Standard: Serves as a high-purity analytical standard for quality control and method validation in pharmaceutical analysis.
• Chemical Synthesis: Used in organic synthesis to introduce the thiouracil moiety into target molecules for various experimental applications.

Basic Information

Product Name	Methylthiouracil
CAS No.	91795-77-6
Molecular Formula	C5H6N2OS
Molecular Weight	142.18 g/mol
Synonyms	4-Methyl-2-thiouracil; 2-Thio-4-methyluracil; 4-Methyl-2-mercaptopyrimidin-4(3H)-one; 6-Methyl-2-thiouracil; 2-Mercapto-6-methylpyrimidin-4(1H)-one; 4-Methyl-2-thio-2,4-dihydroxypyrimidine; Methylthiouracil; NSC 403697
EINECS	Contact for details

Quality Control

Our Methylthiouracil is produced and tested under a rigorous quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting key parameters such as assay, related substances, and residual solvents. We adhere to cGMP principles where applicable to support its use in regulated research and development environments.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥98.0%
Loss on Drying	≤1.0%
Residue on Ignition	≤0.1%
Related Substances (HPLC)	Total impurities ≤2.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.