Product Identification

Product Name

Embonic acid

Synonyms

2,2'-Dihydroxy-1,1'-dinaphthylmethane-3,3'-dicarboxylic acid
2-Naphthalenecarboxylic acid, 4,4'-methylenebis[3-hydroxy-
4,4'-Methylenebis[3-hydroxy-2-naphthoic acid]
4-[(3-Carboxy-2-hydroxynaphthalen-1-yl)methyl]-3-hydroxynaphthalene-2-carboxylic acid
Bis(2-hydroxy-3-carboxy-1-naphthyl)methane
Embonic acid

CAS

130-85-8

Formula

C23H16O6

Molecular Weight

388.38

EINECS

204-998-0

RTECS

QL2180000

RTECS Class

Drug; Primary Irritant

Merck

12,7136

Beilstein/Gmelin

901319

Beilstein Reference

4-10-00-02362

Physical and Chemical Properties

Appearance

Odorless yellow solid

Solubility in water

Insoluble

Melting Point

295 - 300

pKa/pKb

2.67 (pKa)

Partition Coefficient

4.46

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.

Inhalation

Remove from exposure to fresh air immediately. Get medical aid if cough or other symptoms appear.

Skin

Get medical aid if irritation develops or persists. Flush skin with plenty of soap and water.

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 tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling

Wash thoroughly after handling. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation.

Hazards Identification

Ingestion

May cause irritation of the digestive tract.

Inhalation

May cause respiratory tract irritation.

Skin

May cause skin irritation.

Eyes

Causes eye irritation.

EC Risk Phrase

R 36

EC Safety Phrase

S 26 39

Exposure Controls/Personal Protection

Personal 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.

Fire Fighting Measures

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions.

Stability and Reactivity

Disposal Code

4

Stability

No data.

Incompatibilities

Strong oxidizing agents

Decomposition

Carbon monoxide, carbon dioxide.

Transport Information

HS Code

2918 29 90