Description

Propanethioic Acid S-Isopentyl Ester is a specialized organosulfur compound with a distinctive thioester functional group. This chemical is valued for its role as a versatile intermediate and flavor/fragrance component due to its unique sulfur-containing structure. It is primarily sought by manufacturers in the flavor & fragrance, agrochemical, and fine chemical synthesis industries for creating complex molecules and imparting specific organoleptic notes.

Application

• Flavor & Fragrance Industry: Used as a key intermediate or additive for creating sulfurous, tropical, or fruity flavor profiles (e.g., passionfruit, grapefruit) and in specialty fragrance compositions.
• Agrochemical Synthesis: Serves as a building block in the production of certain pesticides, herbicides, and plant growth regulators where the thioester moiety is integral to biological activity.
• Pharmaceutical Intermediates: Acts as a precursor in the synthesis of active pharmaceutical ingredients (APIs) and other bioactive molecules requiring specific sulfur-based functionalization.
• Organic Synthesis & Research: Employed as a reagent in various organic transformations, including acyl transfer reactions, and as a standard in analytical chemistry research.
• Polymer Additives: Can be utilized in the production of specialty polymers or as a modifier to impart specific chemical properties to polymer chains.

Basic Information

Product Name	Propanethioic Acid S-Isopentyl Ester
CAS No.	2432-49-7
Molecular Formula	C8H16OS
Molecular Weight	160.28 g/mol
Synonyms	S-Isopentyl thiopropanoate; 3-Thiapentyl isovalerate; Isopentyl thiopropionate; Isopentyl propanethioate; Propionic acid, thio-, S-isopentyl ester; 1-Methylbutyl thiopropanoate; 3-Methylbutyl thiopropionate; FEMA 3898
EINECS	219-402-7

Quality Control

Every batch of Propanethioic Acid S-Isopentyl Ester is produced and tested under a strict quality management system. We ensure compliance with relevant industry standards, including FEMA and FCC guidelines for flavor-grade material. Comprehensive testing includes identity confirmation, purity assay, and impurity profiling. A detailed Certificate of Analysis (COA) is provided with each shipment to guarantee specification adherence and traceability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials. Due to its property of being easily oxidized, it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term preservation. Recommended storage temperature is 2-8°C to maximize stability.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Refractive Index (20°C)	1.460 - 1.470
Specific Gravity (20/20°C)	0.920 - 0.940
Related Substances (GC)	Total impurities ≤ 2.0%

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