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benzen-1,4-diol Hydroquinone
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Description
1,4-Dihydroxybenzene
Other Names: Hydroquinone, Quinol
CAS Number: 123-31-9
Sum Formula: C6H4(OH)2
Molar Mass: 110.11 g/mol
Appearance: White crystalline solid
1,4-Dihydroxybenzene, also known as hydroquinone or quinol, is an aromatic organic compound primarily used as a reducing agent in various industrial applications. It is commonly used in the production of photographic developers, antioxidants, and in the polymer industry. It also has applications in the cosmetic industry for skin lightening.
Chemical and Physical Properties
Density: 1.32 g/cm³
Melting Point: 172–174°C
Boiling Point: 287°C
Solubility in Water: Soluble (51 g/L at 25°C)
Odor: Odorless
Applications
Industrial Uses: Commonly used as a reducing agent in photographic developing solutions, antioxidants in cosmetics, and in the production of resins and polymers.
Cosmetic Industry: Used in skin lightening formulations as it inhibits the production of melanin.
Safety
Signal Word: Danger
Hazard Statements:
H302: Harmful if swallowed.
H317: May cause an allergic skin reaction.
H318: Causes serious eye damage.
H341: Suspected of causing genetic defects.
H351: Suspected of causing cancer.
H400: Very toxic to aquatic life.
Precautionary Statements
P101: If medical advice is needed, have product container or label at hand.
P102: Keep out of reach of children.
P280: Wear protective gloves.
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P310: Immediately call a poison center or doctor.
P405: Store locked up.
P501: Dispose of contents/container to an authorized waste disposal point or return to supplier.
First Aid Measures
Eye Contact: Immediately flush eyes with water for several minutes. Open eyelids wide (even with force) to ensure complete flushing. If contact lenses are present, remove them immediately. Continue rinsing for 10-30 minutes. Seek medical attention immediately.
Skin Contact: Remove contaminated clothing. Wash the affected area with large amounts of lukewarm water. If no skin damage has occurred, mild soap or shampoo may be used. Seek medical attention if irritation persists.
Inhalation: Remove the person from exposure to fresh air immediately. Keep the person warm and ensure they receive medical care if symptoms persist.
Ingestion: Rinse mouth thoroughly with water and drink 200-500 mL of water. Seek medical attention immediately.
Handling and Storage
Storage Conditions: Store in a cool, dry place in tightly closed containers. Keep away from incompatible materials such as strong oxidizers.
Handling Precautions: Avoid direct contact with skin and eyes. Use appropriate personal protective equipment, such as gloves and safety glasses, to minimize exposure. Avoid dust formation and ensure proper ventilation in work areas.