2-Hydroxy-3-methylbenzaldehyde

  • 2,3-Cresotaldehyde
  • 3-Methylsalicylaldehyde
  • o-Homosalicylaldehyde
  • 2-Hydroxy-m-tolualdehyde
Formula
C8H8O2
Structure
Description
Clear, light yellow-green liquid.

Registry Numbers and Inventories.
CAS
824-42-0
36/37/38
UN (DOT)
1993
Beilstein/Gmelin
1099377
Beilstein Reference
4-08-00-00430

Properties.
Formula
C8H8O2
Formula mass
136.15
Melting point, °C
17
Boiling point, °C
211
Vapor pressure, mmHg
0.15 (25 C)
Critical temperature
482
Critical pressure
47.14
Density
1.123 g/cm3 (25 C)
Solubility in water
8.8 g/L (25 C)
Refractive index
1.562 (25 C)
pKa/pKb
8.52 (pKa)
Partition coefficient, pKow
2.07
Heat of vaporization
46.23 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed. Keep away from heat and open flame. Store in a cool dry place.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles. Protective clothing.
Respirators
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU). Where risk assessment shows air-purifying respirators are appropriate use a full-face respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls. If the respirator is the sole means of protection, use a full-face supplied air respirator.
Small spills/leaks
Cover with dry lime or soda ash, pick up, keep in a closed container, and hold for waste disposal. Ventilate area and wash spill site after material pickup is complete.
Incompatibilities
Strong oxidizing agents.
Decomposition
Oxides of carbon.

Fire.
Flash Point,°C
88
Fire fighting
For small (incipient) fires, use media such as alcohol foam, dry chemical, or carbon dioxide. For large fires, apply water from as far as possible. Use very large quantities (flooding) of water applied as a mist or spray; solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Fire potential
Combustible liquid.
Hazards
Emits toxic fumes under fire conditions.

Health.
Exposure effects
Vapor or mist is irritating to the eyes, mucous membranes, and upper respiratory tract. May be harmful by inhalation, ingestion, or skin absorption.
   Skin
Causes irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water. Remove contaminated clothing and shoes. Call a physician.
   Eyes
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Transport.
UN number
1993
Response guide
Hazard class
3
Packing Group
III