2-Hydroxy-5-methylbenzaldehyde

  • 2,5-Cresotaldehyde
  • 2-Formyl-4-methylphenol
  • 5-Methyl-2-hydroxybenzaldehyde
  • 5-Methylsalicylaldehyde
  • NSC 97517
Formula
C8H8O2
Structure
Description
Faintly yellow crystals.

Registry Numbers and Inventories.
CAS
613-84-3
EC (EINECS/ELINCS)
210-357-6
36/37/38
Beilstein/Gmelin
2040673
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C8H8O2
Formula mass
136.15
Melting point, °C
54
Boiling point, °C
217
Vapor pressure, mmHg
0.09 (25 C)
Critical temperature
482
Critical pressure
47.14
Density
1.0913 g/cm3 (59 C)
Solubility in water
8.3 g/L (25 C)
Refractive index
1.547 (59<sup>o</sup>C)
pKa/pKb
8.47 (pKa)
Partition coefficient, pKow
2.07
Heat of vaporization
47.24 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed. 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 dust mask type N95 (US) or type P1 (EN 143) 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
85
Fire fighting
Extinguish with water spray, carbon dioxide, dry chemical powder or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
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.