Product Identification

Product Name

3,6-Pyridazinediol

Synonyms

1,2-Dihydropyridazine-3,6-dione
3,6-Pyridazinediol
Antergon
Maleic acid hydrazide
Maleic hydrazide
Vondalhyde

CAS

123-33-1

Formula

C4H4N2O2

Molecular Weight

112.09

EINECS

204-619-9

RTECS

UR5950000

RTECS Class

Agricultural Chemical and Pesticide; Tumorigen; Mutagen

Merck

13,5728

Beilstein/Gmelin

112223

Beilstein Reference

5-24-06-00012

Physical and Chemical Properties

Appearance

Odorless white solid.

Solubility in water

Very soluble

Melting Point

292

Density

1.60 g/cm3 (20 C)

pKa/pKb

9.21 (pKa)

Partition Coefficient

-.84

Heat Of Vaporization

Heat Of Combustion

-2114 kJ/mol

Usage

Experimental use: in horticulture & agriculture, in synthesis of pyridazine.

Odor threshold

Odorless

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 if irritation or symptoms occur.

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

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. If irritation develops, get medical aid.

Handling and Storage

Storage

Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling

Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification

Inhalation

Dust is irritating to the respiratory tract.

Skin

May cause skin irritation.

Eyes

Dust may cause mechanical irritation.

Ingestion

May cause irritation of the digestive tract. May cause central nervous system effects.

EC Risk Phrase

R 36/37/38 40

EC Safety Phrase

S 26 36/37/39

UN (DOT)

2811

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.

Exposure Effects

Chronic ingestion may cause liver damage.

Poison Class

4

Fire Fighting Measures

Flash Point

300

Autoignition

430

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 appropriate foam.

Fire Potential

Combustible solid.

Accidental Release Measures

Small spills/leaks

Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal.

Stability and Reactivity

Disposal Code

3

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents, strong acids, pesticides which are highly alkaline in reaction.

Decomposition

Nitrogen oxides, carbon monoxide, carbon dioxide.

Combustion Products

Toxic nitrogen oxides are produced.

Transport Information

UN Number

2811

HS Code

2933 99 90