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hay concrete

Hay concrete is an aromatic extract from ryegrass with a distinct hay scent, primarily utilized as a fragrance agent in perfumery.

General Material Description

Hay concrete is a type of concrete extract obtained from Lolium perenne, commonly known as perennial ryegrass. This concrete is characterized by a strong hay-like aroma, reflecting its botanical origin. It appears as a fragrant, semi-solid material used primarily in perfumery to impart natural, green, hay notes. Synonyms include oils, hay; foin coupe concrete; and ryegrass concrete. The substance is sourced by solvent extraction of fresh or dried ryegrass and related hay flowers, capturing the plant's characteristic volatile compounds. For further chemical details, see the PubChem entry.

Occurrence, Applicability & Potential Uses

This concrete is naturally derived from ryegrass (Lolium perenne), a common species in temperate grasslands. Its distinctive hay odor has made it valuable in fragrance manufacturing, used to replicate fresh-cut grass or dry hay notes. According to IFRA (Global) standards, hay concrete is recommended for use in fragrance formulations with usage levels up to 3.0% in concentrates. While it carries notable olfactive importance, it is not intended for flavor applications. Its application scope is mainly in fine fragrances, personal care products, and scented formulations that require natural green or herbal nuances.

Physico-Chemical Properties Summary

Hay concrete is typically a semi-solid, lipophilic material obtained through solvent extraction that retains much of the original plant's aromatic hydrocarbon constituents. It is characterized by a strong hay-like odor at pure concentration, indicating high volatility of odor-active components. The physical nature as a concrete influences its solubility, stability, and blending behavior in aromatic compositions. Its susceptibility to oxidation or degradation under light or heat suggests careful formulation and storage considerations are necessary to preserve fragrance quality.

FAQ

What is hay concrete and where does it come from?
Hay concrete is an aromatic extract derived from Lolium perenne, commonly known as ryegrass. It results from solvent extraction of fresh or dried ryegrass, capturing the plant's natural odorants. This concrete exhibits a pronounced hay scent, making it distinctive among fragrance materials. Its typical use is in perfumery and fragrance formulations.
How is hay concrete used and regulated in fragrance products?
Hay concrete is primarily used as a fragrance ingredient to impart natural hay and green notes in perfumes and scented products. The IFRA (International Fragrance Association) regulates its use globally, recommending maximum concentrations of up to 3.0% in fragrance concentrates. It is not approved for flavoring purposes. Compliance with these standards ensures safe and effective formulation.
Are there any safety concerns or regulations associated with hay concrete?
Hay concrete has not been classified with hazard statements under OSHA's GHS classification and shows no specific toxicity data in oral, dermal, or inhalation routes. Safety assessments, such as those by RIFM, support its controlled usage in fragrances. Regulatory filings include listing under TSCA and Canada’s Domestic Substances List, and usage guidelines are detailed in IFRA’s Code of Practice. Formulators should adhere to recommended levels to maintain product safety.

US / EU / FDA / JECFA / FEMA / Scholar / Patents

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Other Information

Export Tariff Code:3301.90.5000
Wikipedia:View

General Material Information

Preferred name hay concrete
Trivial Name Oils, hay
Short Description lolium perenne concrete
CAS Number 8031-00-3
FDA UNII Search
Synonyms
  • foin coupe concrete
  • hay concrete (for fragrance) (Robertet)
  • hay flowers concrete
  • lolium perenne concrete
  • lolium perenne l. concrete
  • ryegrass concrete
  • Oils, hay
  • Hay oil
  • Oils, Hierochleaalpina

PhysChem Properties

Material listed in food chemical codex No

Organoleptic Properties

Odor Type: Hay
hay, coumarinic
General comment At 100.00 %. hay

Occurrences

Safety Information

Safety information

Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Pictogram
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
Not determined
Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined

Safety in use information

Category:
fragrance agents
RIFM Fragrance Material Safety Assessment: Search
IFRA Code of Practice Notification of the 49th Amendment to the IFRA Code of Practice
Recommendation for hay concrete usage levels up to:
3.0000 % in the fragrance concentrate.
Recommendation for hay concrete flavor usage levels up to:
not for flavor use.

Safety references

EPA Substance Registry Services (TSCA):8031-00-3
EPA ACToR:Toxicology Data
EPA Substance Registry Services (SRS):Registry
National Institute of Allergy and Infectious Diseases:Data
lolium perenne l. concrete
Chemidplus:0008031003