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Current Position: Home > Dictionary EN > U > 57-13-6

Urea 57-13-6

Chemical Name Urea
CAS Registry Number 57-13-6
PubChemID 1176
Molecular Weight 60.05526
PSA 69.11000
LogP 0.42440
EINECS 200-315-5
Molecular Formula CH4N2O
 
57-13-6 Properties
Density 1.335
Boiling Point 196.6 ℃ at 760mmHg
Flash Point 72.7℃
Melting Point 131-135℃
Appearance White crystalline powder
Vapour 1.20e-05 mmHg
Refractive Index n20/D 1.40
Solubility 1080 g/L (20°C) in water
Color/Form white
Stability Substances to be avoided include strong oxidizing agents. Protect from moisture.
HS Code 31021010
Storage temp 2-8°C
Spectral properties IR: SADG 123 (Sadtler Research Laboratories IR Grating Collection)
UV: OES 1-3 (Organic Electronic Spectral Data, Phillips et al, John Wiley & Sons, New York)
1H NMR: SAD 16982 (Sadtler Research Laboratories Spectral Collection)
MS: NIST 19004 (NIST/EPA MSDC Mass Spectral Database 1990 version)
 
57-13-6 Safety Infomation
Safety Statements S24/25
Risk Statements R36/37/38
Safety A very dangerous high explosive. May explode violently in ice water or on exposure to light. When heated to decomposition it emits toxic fumes of CO and NOx.
Hazard Codes:Xn,Xi
Risk Statements: 36/37/38-40
R36/37/38: Irritating to eyes, respiratory system and skin.
R40: Limited evidence of a carcinogenic effect.
Safety Statements: 26-36-24/25
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36: Wear suitable protective clothing.
S24/25: Avoid contact with skin and eyes.
Toxicity LD50 orally in Rabbit: 8471 mg/kg LD50 dermal Rat 8200 mg/kg
Skin, Eye, and Respiratory Irritations Urea causes redness and irritation of skin and eyes.
Cleanup Methods Water Spill: Contain by damming, water diversion or natural barriers. Remove and treat contaminated liquids. Absorb small amounts of liquid spill with natural or synthetic sorbents, shovel into containers and cover.
If urea is spilled in solid form, shovel material into containers and cover. Construct barriers to contain solutions or divert to impermeable holding area. Remove material by manual or mechanical means.
Fire Potential Noncombustible
Formulations/Preparations DOSAGE FORMS--STERILE USP: 40 & 90 G.
Ultrahigh purity grades; solutions at 5M /American Research Products Co/
UAL-37 contains 35% urea
N-Dure contains 26% urea
UF Concentrate-85 contains 26% urea
Urea is pelletized or prilled to avoid caking and to make it easy to handle.
Ureacin-20 Creme contains urea at 20%; Ureacin-40 Creme contains urea at 40%; Ureacin-10 lotion contains urea at 10%.
Technical; CP; US; fertilizer (45-46% nitrogen); feed grade (about 42% nitrogen)
Formulations (solid form): urea-ammonia phosphate (UAP); urea-ammonia sulfate (UAS); urea-phosphate. Formulations (solution): urea-ammonia nitrate (UAN)
Grade: reagent-grade; solid urea
Exposure Standards and Regulations Substance added directly to human food affirmed as generally recognized as safe (GRAS).
Reactivities and Incompatibilities Reacts violently with gallium perchlorate.
Urea is excreted in human urine, react /s/ with chlorine to form chloramines.
Reacts with sodium hypochlorite or calcium hypochlorite to form the explosive nitrogen trichloride. Incompatible with NaNO2; P2Cl5; nitrosyl perchlorate.
Other Preventative Measures SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.
Protective Equipment and Clothing Urea causes redness and irritation of skin and eyes.
Specification The chemical synonyms of Urea (CAS NO.57-13-6) are Urea hydrochloride ; Urea, prilled ; Urea fertilizer ; Ureum ; (NH2)2CO ; ai3-01202 ; Alphadrate. Urea has two amine (-NH2) residues joined by a carbonyl (-CO-) functional group.Urea plays an important role in the metabolism of nitrogen-containing compounds by animals, and is the main nitrogen-containing substance in the urine of mammals. Being solid, colourless, odorless, neither acidic nor alkaline, highly soluble in water, and relatively non-toxic, urea is widely used in fertilizers as a convenient source of nitrogen. Urea is also an important raw material for the chemical industry.
Octanol/Water Partition Coefficient log Kow = -2.11
Disposal Methods

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.
Urea is a waste chemical stream constituent which may be subjected to ultimate disposal by controlled incineration. Incinerator is equipped with a scrubber or thermal unit to reduce nitrogen oxide emissions.
The following wastewater treatment technology has been investigated for urea: Concentration process: Biological treatment.

 
 
 
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