Benzoin

  • 2-Hydroxy-2-phenylacetophenone
  • Benzoylphenyl carbinol
  • 2-Hydroxy-1,2-diphenylethanone
Formula
C14H12O2
Structure
Description
Slightly acrid taste. When broken the fresh surfaces have a milky-white color.
Uses
In organic syntheses.

Registry Numbers and Inventories.
CAS
119-53-9
EC (EINECS/ELINCS)
204-331-3
S 22 24/25
RTECS
DI1590000
RTECS class
Tumorigen; Mutagen
Merck
13,1094
Beilstein/Gmelin
391839
Beilstein Reference
4-08-00-01279
Swiss Giftliste 1
G-1235
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C14H12O2
Formula mass
212.25
Melting point, °C
130 - 132
Boiling point, °C
344
Vapor pressure, mmHg
3E-5 (25 C)
Density
1.31 g/cm3 (20 C)
Solubility in water
300 mg/L
pKa/pKb
12.28 (pKa)
Partition coefficient, pKow
2.45
Heat of vaporization
61.9 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Protective gloves. Safety goggles.
Respirators
Wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter.
Small spills/leaks
If a spill of this chemical occurs, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with acetone and transfer the dampened material to a suitable container. Use absorbent paper dampened with acetone to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with acetone followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Disposal code
3
Stability
No data.
Incompatibilities
Sensitive to heat and light Incompatible with oxidizers.

Fire.
Flash Point,°C
155
Autoignition, °C
182
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. A water spray may also be used.
Fire potential
This material is probably combustible.
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Inhalation
Acute effects - cough, sore throat. Irritates eyes, skin and respiratory tract.
   Skin
Redness
   Eyes
Redness

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
HS Code
2914 40 90