Product Identification

Product Name

2,4-Dihydroxypyridine

Synonyms

2(1H)-Pyridinone, 4-hydroxy-
2,4-Dihydroxypyridine
2,4-Pyridinediol
2-Hydroxy-1H-pyridin-4-one
3-Deazauracil
4-Hydroxy-2(1H)-pyridinone

CAS

626-03-9

Formula

C5H5NO2

Molecular Weight

111.1

EINECS

210-924-8

RTECS

UV1146800

RTECS Class

Other

Beilstein/Gmelin

108533

Beilstein Reference

5-21-12-00095

Physical and Chemical Properties

Appearance

Off-white solid.

Melting Point

275 - 277

Boiling Point

315

Partition Coefficient

-1.39

First Aid Measures

Ingestion

Do NOT induce vomiting. 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. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.

Skin

Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.

Eyes

Immediately 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.

Handling

Wash thoroughly after handling. Avoid breathing dust, vapor, mist, or gas. Do not get on skin or in eyes. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

May cause gastrointestinal irritation with nausea, vomiting and diarrhea.

Inhalation

Causes respiratory tract irritation.

Skin

Causes skin irritation.

Eyes

Causes eye irritation.

EC Risk Phrase

R 36/37/38

EC Safety Phrase

S 26 36

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear chemical goggles. 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. Extinguishing media: Use water spray, 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, using the appropriate protective equipment.

Stability and Reactivity

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents, strong acids, strong bases, acid chlorides, and acid anhydrides.

Decomposition

Nitrogen oxides, carbon monoxide, carbon dioxide.