5,5'-Methylenedisalicylic acid

  • 5,5'-Methylenedi(salicylic acid)
  • 2,2'-Dihydroxy-5,5'-methylenedibenzoic acid
  • 5-(3-Carboxy-4-hydroxybenzyl)salicylic acid
  • 4,4'-Dihydroxydiphenylmethane-3,3'-dicarboxylic acid
  • 4,4'-Dihydroxy-3,3'-dicarboxydiphenylmethane
  • 3,3'-Methylenebis[6-hydroxybenzoic acid]
Formula
C15H12O6
Structure
Description
Crystals.

Registry Numbers and Inventories.
CAS
122-25-8
EC (EINECS/ELINCS)
204-530-5
S: 24/25
Merck
12,6142
Swiss Giftliste 1
G-8279
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C15H12O6
Formula mass
288.26
Melting point, °C
238
Vapor pressure, mmHg
8.2E-14 (25 C)
Density
1.511 g/cm3 (20 C)
Solubility in water
Insoluble
pKa/pKb
2.94 (pKa)
Partition coefficient, pKow
3.89

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container.
Protection
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. Wear appropriate protective gloves and clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, observing precautions in the Protective Equipment section. Avoid generating dusty conditions. Provide ventilation.
Incompatibilities
Oxidizing agents.
Decomposition
Oxides of carbon.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguish with foam, dry chemical or carbon dioxide.
Combustion products
During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
   Ingestion
May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
May cause irritation.
   Eyes
May cause irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Wash mouth out with water.
   Inhalation
Remove from exposure and move 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 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.