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Benzyl alcohol

Benzyl alcohol

Basic Information

CAS No.: 100-51-6
Molecular Formula: C7H8O
Molecular Weight: 108.14

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Product Details

Benzyl alcohol is a colorless, slightly viscous liquid with a mild aromatic odor. It features low toxicity, good solubility, and mild antibacterial properties. Widely used as a solvent, preservative, and chemical intermediate, it is commonly applied in pharmaceuticals, cosmetics, fragrances, inks, coatings, and polymer production.


Chemical Properties

PropertyValue
Melting point-15 °C
Boiling point205 °C
Density1.045 g/mL at 25 °C (lit.)
Vapor density3.7 (vs air)
Vapor pressure13.3 mm Hg (100 °C)
Refractive indexn20/D 1.539 (lit.)
FEMA2137 | BENZYL ALCOHOL
Flash point201 °F
Storage conditionStore at +2°C to +25°C.
SolubilityH₂O: 33 mg/mL, clear, colorless
Acid dissociation constant (pKa)14.36 ± 0.10 (Predicted)
FormLiquid
ColorAPHA: ≤20
Relative polarity0.608
OdorMild
Flavor typeFloral
Biological sourceSynthetic
Explosive limit1.3-13% (V)
Water solubility4.29 g/100 mL (20 °C)
Thermal conductivity0.159 W/(m·K) at 25 °C
Merck14,1124
JECFA Number25
BRN878307
Henry's Law Constant<2.70 x 10⁻⁷ at 25 °C (thermodynamic method-GC/UV, Altschuh et al., 1999)
Exposure limitNo exposure limit is set. Because of its low vapor pressure and low toxicity, the health hazard to humans from occupational exposure should be very low.

Safety Information

PropertyValue
Hazard symbolsXn, T
Hazard class codes20/22-63-43-36/37/38-23/24/25-45-40
Safety descriptions26-36/37-24/25-23-53
UN dangerous goods numberUN 1593 6.1/PG 3
WGK Germany1
RTECS numberDN3150000
F8-10-23-35
Autoignition temperature817 °F
TSCATSCA listed
HS code29062100
Storage class10 - Combustible liquids
Hazard class (category)Acute toxicity, Category 4, Inhalation
Acute toxicity, Category 4, Oral
Eye irritation, Category 2
Hazardous substances data100-51-6 (Hazardous Substances Data)
ToxicityLD50 orally in rats: 3.1 g/kg (Smyth)


Product Usage

Benzyl alcohol is the simplest aromatic alcohol and is widely used across multiple industries. In the pharmaceutical field, it is mainly used as an excipient in local anesthetics and as a preservative in injections, effectively inhibiting microbial growth. In the cosmetics and personal care industry, it serves as a fixative and solvent, commonly found in perfumes, skin care products, and shampoos. In the coatings and ink industry, benzyl alcohol is an effective coalescing agent and leveling agent, improving coating uniformity. Additionally, it is used as a cleaning agent in electronic chemicals and as a flavoring ingredient in the food industry. Its low toxicity and good solubility make it an important fine chemical intermediate.

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