Flavors & Fragrances
REACH
Coumarin
CAS Number
91-64-5
EC Number
202-086-7
What is Coumarin?
Coumarin (CAS 91-64-5) is a naturally occurring lactone compound used as a fragrance ingredient and flavoring agent.
Where is Coumarin used?
- Perfumery: sweet, hay-like scent building block
- Personal care and cosmetics: warm, powdery base note in fine fragrances, soaps, and lotions
- Food and beverage: flavoring agent in baked goods at controlled levels
- Confectionery and alcoholic beverages, subject to regional regulatory limits
- Printing and packaging: derivatives function as optical brighteners and UV-curable coating components in specialty inks
- Industrial formulations: antioxidant stabilizer where oxidative degradation must be controlled
Good to know: Pharma-aligned specifications conforming to BP or Ph. Eur. standards are available for regulated end uses.
Commercial specifications
- Standard commercial grades include food-grade and technical-grade
- Purity levels typically ranging from 98% to 99%+ depending on application requirements
Other Names (Synonyms)
O-Hydroxyzimtsaure-lacton|O-Hydroxycinnamic lactone|o-hydroxycinnamic acid delta-lactone|Coumarine|chromen-2-one|Benzo-alpha-pyrone|2H-Chromen-2-one (ACD/Name 4.0)|2H-Chromen-2-one
What are the physical properties of Coumarin?
Melting Point 71 °C
Boiling Point 301.71 °C
Density 0.935 g/cm³ @ Temp: 20 °C
Flash Point 162 °C
Appearance WHITE CRYSTALS OR CRYSTALLINE POWDER
Color White
Odor at 10.00 % in dipropylene glycol. sweet hay tonka new mown hay
Form Crystals or Crystalline Powder
Water Solubility 1.7 g/L (20 ºC)
Vapor Pressure 0.01 mm Hg ( 47 °C)
Refractive Index 1.5100 (estimate)
Log P 1.39 at 25℃
How is Coumarin classified and handled safely? Learn More
Danger
GHS06· Toxic GHS07· Irritant GHS08· Health Hazard
Hazard Statements
H301 Toxic if swallowed
H302 Harmful if swallowed
H317 May cause an allergic skin reaction
H373 May causes damage to organs through prolonged or repeated exposure
Precautionary Statements
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
Which trade and regulatory codes apply to Coumarin?
HS Code 29322000
UN Number 2811
ADR Class 6.1
Packing Group III
Storage Class 6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects
WGK (Germany) 1