Benzaldehyde

  • Benzoic aldehyde
  • Benzene carboxaldehyde
  • Artificial almond oil
  • Benzenecarbonal
Formula
C7H6O
Structure
Description
Colorless to yellow, oily liquid, odor resembles oil of bitter almond.
Uses
Benzaldehyde is used primarily as a flavouring agent and odorant in food, drink, cosmetics, pharmaceuticals and cleaning products; intermediate in manufacturing dyes, odorants, flavouring agents, pharmaceuticals and pesticides; some solvent use for oils and resins; plastics additive.

Registry Numbers and Inventories.
CAS
100-52-7
EC (EINECS/ELINCS)
202-860-4
EC Index Number
605-012-00-5
EC Class
Harmful
RTECS
CU4375000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Drug; Mutagen; Primary Irritant
UN (DOT)
1990
Merck
13,1057
Beilstein/Gmelin
471223
Beilstein Reference
4-07-00-00505
EPA OPP
8601
Swiss Giftliste 1
G-1218
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C7H6O
Formula mass
106.13
Melting point, °C
-26
Boiling point, °C
179
Vapor pressure, mmHg
0.1 (20 C)
Vapor density (air=1)
3.6
Saturation Concentration
1300 ppm at 26 C
Odor Threshold Odor threshold 0.042 ppm
Critical temperature
352
Critical pressure
21.5
Density
1.049 g/cm3 (20 C)
Solubility in water
Slightly soluble.
Viscosity
1.39 cp at 25C
Surface tension
40.0 g/s2 (20 C)
Refractive index
1.5456 (20 C)
Partition coefficient, pKow
1.48
Heat of vaporization
493.3 kJ/mol
Heat of combustion
-3524 kJ/mol

Hazards and Protection.
Storage
Keep away from heat and flame. Keep away from sources of ignition. Store in a tightly closed container. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from reducing agents. Do not store near alkaline substances.
B3 D2B
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Avoid runoff into storm sewers and ditches which lead to waterways. Use water spray to disperse the gas/vapor. Remove all sources of ignition. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite.
Disposal code
1
Stability
Stable under normal shipping and handling conditions.
Incompatibilities
Incompatible with strong oxidizing agents. Oxidizes in air to benzoic acid. Reacts dangerously with performic acid.
Decomposition
Carbon monoxide, irritating and toxic gases, carbon dioxide.

Fire.
Flash Point,°C
64
Autoignition, °C
190
Upper exp. limit, %
8.5
Lower exp. limit, %
1.4
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use water spray to cool fire-exposed containers. Use water spray, dry chemical, or foam. Use carbon dioxide.
Fire potential
HIGHLY FLAMMABLE.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. May polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
2
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
Prolonged or repeated skin contact may cause dermatitis. May cause kidney injury.
   Ingestion
Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause central nervous system depression, characterized by excitement, followed by headache, dizziness, drowsiness, and nausea. Advanced stages may cause collapse, unconsciousness, coma and possible death due to respiratory failure.
   Inhalation
Inhalation of high concentrations may cause central nervous system effects characterized by headache, dizziness, unconsciousness and coma. May cause respiratory tract irritation. May cause narcotic effects in high concentration.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1990
Response guide
Hazard class
9
Packing Group
III
 
USCG CHRIS Code
BZD
 
HS Code
2912 21 00
 
Std. Transport #
4961604