Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity
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Hydroxyhydroquinone(533-73-3)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity

Product Identification

Product Name
Hydroxyhydroquinone
Synonyms
1,2,4-Trihydroxybenzene
2,5-Dihydroxyphenol
2-Hydroxy-1,4-hydroquinone
4-Hydroxycatechol
Benzene-1,2,4-triol
Hydroxyhydroquinone
CAS
533-73-3
Formula
C6H6O3
Molecular Weight
126.11
EINECS
208-575-1
RTECS
DC4200000
RTECS Class
Mutagen; Primary Irritant
Merck
13,1073
Beilstein/Gmelin
2042863
Beilstein Reference
4-06-00-07338

Physical and Chemical Properties

Appearance
Beige powder.
Solubility in water
Soluble
Melting Point
140
Boiling Point
362
Vapor Pressure
.00001
Density
1.45 g/cm3
pKa/pKb
9.58 (pKa)
Partition Coefficient
.06
Heat Of Vaporization
63.2 kJ/mol
Heat Of Combustion
-2655 kJ/mol
Usage
Substance is used in gas analysis.
Vapor Density
Negligible
Refractive Index
1.5445 (20 C)

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.
Inhalation
Remove from exposure 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 soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
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
Keep containers tightly closed. Do not expose to air. Store protected from light. Store in a cool, dry area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Store protected from light. Store protected from air. Do not breathe dust.

Hazards Identification

Inhalation
Causes respiratory tract irritation. Can produce delayed pulmonary edema.
Skin
Causes skin irritation. Substance is readily absorbed through the slkin.
Eyes
Causes eye irritation. May cause chemical conjunctivitis.
Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
EC Risk Phrase
R 36/37/38
EC Safety Phrase
S 26 36

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 and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Exposure Effects
Effects may be delayed.
Poison Class
3

Fire Fighting Measures

Flash Point
193
Fire Fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.

Accidental Release Measures

Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Incompatibilities
Oxidizing agents, bases, acid chlorides, acid anhydrides, air, direct light.
Stability
Stable under normal temperatures and pressures. May discolor on exposure to air. Light sensitive.
Decomposition
Carbon monoxide, carbon dioxide, acrid smoke and fumes.
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