Product Identification

Product Name

5,5'-Methylenedisalicylic acid

Synonyms

2,2'-Dihydroxy-5,5'-methylenedibenzoic acid
3,3'-Methylenebis[6-hydroxybenzoic acid]
4,4'-Dihydroxy-3,3'-dicarboxydiphenylmethane
4,4'-Dihydroxydiphenylmethane-3,3'-dicarboxylic acid
5-(3-Carboxy-4-hydroxybenzyl)salicylic acid
5,5'-Methylenedi(salicylic acid)

CAS

122-25-8

Formula

C15H12O6

Molecular Weight

288.26

EINECS

204-530-5

Merck

12,6142

Physical and Chemical Properties

Appearance

Crystals.

Solubility in water

Insoluble

Melting Point

238

Vapor Pressure

8.2E-14 (25 C)

Density

1.511 g/cm3 (20 C)

pKa/pKb

2.94 (pKa)

Partition Coefficient

3.89

First Aid Measures

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.

Handling and Storage

Storage

Store in a cool, dry place. Store in a tightly closed container.

Hazards Identification

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.

EC Safety Phrase

S: 24/25

Exposure Controls/Personal Protection

Personal 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.

Poison Class

3

Fire Fighting Measures

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.

Accidental Release Measures

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.

Stability and Reactivity

Incompatibilities

Oxidizing agents.

Decomposition

Oxides of carbon.

Combustion Products

During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.