Product Identification
【Product Name】Uracil 2,4-二羟基嘧啶
【Synonyms】2,4(1H,3H)-Pyrimidinedione
【CAS】66-22-8
【Formula】C4H4N2O2
【Molecular Weight】112.09
【EINECS】200-621-9
【RTECS】YQ8650000
【RTECS Class】Tumorigen; Mutagen; Reproductive Effector
【Merck】12,9985
【Beilstein/Gmelin】606623
【Beilstein Reference】5-24-06-00043

Physical and Chemical Properties
【Appearance】White to off-white powder.
【Solubility in water】Soluble
【Melting Point】338℃
【Density】0.98605-0.99744 g/cm3 (55-25℃)
【Partition Coefficient】-.95
【Usage】Substance is used in biochemical research.

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】If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
【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】In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Handling and Storage
【Storage】Store in a cool, dry place. Keep container closed when not in use.
【Handling】Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification
【Ingestion】May cause irritation of the digestive tract.
【Inhalation】May cause respiratory tract irritation.
【Skin】May cause skin irritation.
【Eyes】May cause eye irritation.
【Hazards】Emits toxic fumes under fire conditions. Material ily reacts with water generating flammable and/or explosive hydrogen gas. This material, like most materials in powder form, is capable of creating a dust explosion.
【EC Risk Phrase】14/15 17 34
【EC Safety Phrase】16 24 26 36/37/39 45
【UN (DOT)】3200

Exposure Controls/Personal Protection
【Personal Protection】Compatible chemical-resistant gloves. Chemical safety ggles. Protective clothing.
【Respirators】Use respirators and components tested and approvedunder appropriate vernment standards such as NIOSH (US) or CEN (EU). Where risk assessment shows air-purifying respirators are appropriate use a dust mask type N95 (US) or type P1 (EN 143) respirator.
【Exposure Effects】Harmful if swallowed, inhaled, or absorbed through skin. Symptoms of exposure may include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting. Inhalation may result in spasm, inflammation and edema of the larynx and bronchi, chemical pneumonitis, and pulmonary edema. Material is extremely destructive to tissue of the mucous membranes and upper respiratory tract, eyes, and skin.

Fire Fighting Measures
【Fire Fighting】Use approved class D extinguishers or smother with dry sand, dry ground limestone, or dry clay. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
【Fire Potential】Pyrophoric material.

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.

Stability and Reactivity
【Stability】Stable under normal temperatures and pressures.
【Incompatibilities】Water, air, strong oxidizing agents.
【Decomposition】Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, nitrogen.

Transport Information
【UN Number】3200
【Hazard Class】4.2
【Packing Group】I