Description

(-)-Neomenthol CAS NO 20747-49-3 is a stereoisomer of menthol, a naturally occurring monoterpenoid alcohol with a distinct, clean, and minty-cool organoleptic profile. This specific enantiomer is valued for its unique sensory characteristics and chemical stability compared to other menthol isomers. It is a critical intermediate and active ingredient for manufacturers in the flavor, fragrance, and pharmaceutical industries. Businesses seeking a reliable, high-purity source for product development and formulation will find our supply chain robust and quality consistent.

Application

• Flavor & Fragrance Industry: A key component in creating and modifying mint, cooling, and fresh notes in food flavorings, beverages, chewing gum, oral care products (toothpaste, mouthwash), and fine perfumery.
• Pharmaceuticals: Used as a cooling agent and mild local anesthetic in topical analgesics, cough drops, throat lozenges, nasal decongestants, and medicated balms.
• Aromatherapy & Personal Care: Incorporated into massage oils, lotions, creams, and inhalants for its soothing and refreshing sensory effects.
• Chemical Synthesis: Serves as a chiral building block or intermediate in the synthesis of more complex organic molecules and fine chemicals.
• Tobacco Industry: Employed as a flavor additive in mentholated cigarettes and other tobacco products to provide a characteristic cooling sensation.
• Industrial Applications: Used as a mild corrosion inhibitor and in specialty cleaning formulations where a fresh scent is desired.

Basic Information

Product Name	(-)-Neomenthol
CAS No.	20747-49-3
Molecular Formula	C10H20O
Molecular Weight	156.27 g/mol
Synonyms	(1R,2S,5R)-2-Isopropyl-5-methylcyclohexanol; L-Neomenthol; (1R,2S,5R)-(-)-Menthol; trans-1-Methyl-4-isopropylcyclohexan-3-ol; (-)-trans-p-Menthane-3-ol; Neomenthol; L-Menthol isomer; Cyclohexanol, 5-methyl-2-(1-methylethyl)-, (1R,2S,5R)-
EINECS	244-076-7

Quality Control

Our (-)-Neomenthol is produced and tested under a strict quality management system. We offer grades suitable for various applications, including those compliant with FCC (Food Chemicals Codex) and pharmaceutical standards. Every batch undergoes rigorous analytical testing including chiral purity assay, optical rotation, and identification to ensure consistent identity, purity, and performance. Certificates of Analysis (COA) detailing all specifications are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. For long-term storage, consider under an inert atmosphere to maintain optimal purity.

Specification

Item	Specification
Appearance	White or colorless crystals or crystalline powder
Identification (IR)	Conforms to standard
Assay (GC or HPLC)	≥ 98.0% (typical ≥ 99.0%)
Optical Rotation [α]20/D	-16° to -22° (c=10 in ethanol)
Melting Point	51°C - 54°C
Chiral Purity (Enantiomeric Excess)	≥ 99.0% (-)-Neomenthol
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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