• USA Home
  • W270015 - Methyl cyclopentenolone

W270015 Sigma-Aldrich

Methyl cyclopentenolone

anhydrous, natural, 97%, FG

Synonym: Cyclotene

  • CAS Number 80-71-7

  • Empirical Formula (Hill Notation) C6H8O2

  • Molecular Weight 112.13

  •  FEMA Number 2700

  •  EC Number 201-303-2

  •  Council of Europe no. 758

  •  Flavis number 7.056



Related Categories Alphabetical Listings, Certified Food Grade Products, Certified Natural Products, Flavors and Fragrances, Follows IFRA Guidelines,
grade   FG
  follows IFRA guidelines
reg. compliance   EU Regulation 1223/2009
  FDA 21 CFR (172.515)
  EU Regulation 1334/2008 & 178/2002
assay   97%
mp   104-108 °C
Documentation   see Safety & Documentation for available documents
Organoleptic   bread; burnt; caramel; maple; roasted; sweet
food allergen   no known allergens
fragrance allergen   no known allergens


General description

Methyl cyclopentenolone is one of the flavor compounds of maple syrup, coffee oil and wood smoke. It is reported to be one the key aroma compounds in Wasanbon sugar, contributing to the maple-like flavor. Methyl cyclopentenolone is also one of the major volatile compound formed during the thermal degradation of glucose.


This material is found primarily as the enol form (CAS 80-71-7) in its pure, anhydrous state. Readily forms the diketone form (CAS 765-70-8) in solution.


1 kg in poly bottle

100 g in poly bottle

Other Notes

Download our Flavors and Fragrances Catalog to view our entire product line.

Subscribe to our Newsletter to keep up to date on our latest Flavors and Fragrances offerings.

Safety & Documentation

Safety Information

Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 

New Product Offerings
Protocols & Articles


Securing a Traceable Supply Chain for Food Grade Flavor Ingredients

Introduction Defining "Food Grade" Understanding "Food Grade" Versus "Industrial Grade" Top Questions to Ask a Flavor & Fragrances Supplier The Sigma-Aldrich Approach
Dr. Luke Grocholl
Quality Assurance Supervisor, Sigma-Aldrich Flavors & Fragrances
Keywords: Food & Beverage, Food Safety, Solvents

The Complex Regulatory Landscape for Natural Flavor Ingredients

Introduction The Regulatory Landscape US and EU Definitions of Natural Regional Regulatory Variations The Example of Vanillin The Case for Standardization
Mr. Michael Sabisch1, Mr. David Smith2

1Senior Quality Assurance Specialist
2International Sales Coordinator, Sigma-Aldrich Flavors & Fragrances
Keywords: Fermentation, Food Safety, Oxidations

Understanding the Complexities of Kosher Ingredients

Introduction What is Kosher Product Considerations for Kosher Certification Kosher's Added Benefit to the Food Industry Sigma-Aldrich's Kosher Experience and Offering
Dr. Luke Grocholl1, Rabbi Gershon Segal

1Dr. Luke Grocholl, Quality Assurance Supervisor, Sigma-Aldrich Flavors & Fragrances
Keywords: Fermentation, Food & Beverage, Safety industry

Related Content

Flavors and Fragrances Quality and Regulatory

From a comprehensive vendor approval process, to the testing of raw material at receipt as well as when product is ready to be shipped; we prove our dedication to supply chain transparency, every day.
Keywords: Allergens, Food Safety, Solvents

Peer-Reviewed Papers


Related Products

related product

Product #


Add to Cart

07475 Timestrip® Food
06732 Timestrip® Seafood

Technical Service:

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Bulk Ordering & Pricing:

Need larger quantities for your development, manufacturing or research applications?