Salicylaldehyde

  • 2-Hydroxybenzaldehyde
Formula
HOC6H4CHO
Structure
Description
Liquid; colorless or pale yellow; bitter almond odor.
Uses
In perfumery.

Registry Numbers and Inventories.
CAS
90-02-8
EC (EINECS/ELINCS)
201-961-0
EC Class
harmful, irritant
R 22 36/37/38
S 26 36/37/39
RTECS
VN5250000
RTECS class
Reproductive Effector; Primary Irritant
UN (DOT)
1988
Merck
12,8478
Beilstein/Gmelin
471388
Beilstein Reference
4-08-00-00176
Swiss Giftliste 1
G-2838
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C7H6O2
Formula mass
122.12
Melting point, °C
-7
Boiling point, °C
196
Vapor pressure, mmHg
0.33 (25 C)
Vapor density (air=1)
4.2
Density
1.1748 g/cm3 (0 C)
Solubility in water
Slightly soluble
Surface tension
24.9 g/s2 (190 C)
Refractive index
1.5653 (20 C)
pKa/pKb
8.17 (pKa)
Partition coefficient, pKow
1.61
Heat of vaporization
44.0 kJ/mol
Heat of combustion
-3380 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, 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.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Do not get in eyes, on skin, or on 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. Do not ingest or inhale. Wash clothing before reuse. 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 protective 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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation.
Disposal code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
78
Upper exp. limit, %
8.4
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. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Combustible Liquid. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use water spray to cool fire-exposed containers.
Fire potential
This material is combustible.
Hazards
Can react with oxidizing materials.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
0
 
Flammability
2
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
May cause liver and kidney damage.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
   Inhalation
Causes respiratory tract irritation. Aspiration may lead to pulmonary edema. May also cause pallor, loss of appetite, nausea, vomiting, diarrhea, weakness, darkened urine, headache, sweating, convulsions, cyanosis, unconsciousness, fatigue, pulmonary edema and coma. Inhalation at high concentrations may cause CNS depression and asphixiation.
   Skin
Causes severe skin irritation. May cause liver and kidney damage. May cause skin discoloration. May cause cyanosis of the extremities.
   Eyes
Contact with liquid or vapor causes severe burns and possible irreversible eye damage. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Discard contaminated clothing in a manner which limits further exposure.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1988
Response guide
Hazard class
3
Packing Group
I; II; III
 
USCG CHRIS Code
SAL
 
HS Code
2912 49 00