Urea

Modify Date: 2024-01-02 15:37:11

Urea Structure
Urea structure
Common Name Urea
CAS Number 57-13-6 Molecular Weight 60.055
Density 1.335 Boiling Point 332.48°C
Molecular Formula CH4N2O Melting Point 131-135 ºC
MSDS Chinese USA Flash Point 53.7±22.6 °C

 Use of Urea


Urea is a powerful protein denaturant via both direct and indirect mechanisms[1]. A potent emollient and keratolytic agent[2]. Used as a diuretic agent. Blood urea nitrogen (BUN) has been utilized to evaluate renal function[3]. Widely used in fertilizers as a source of nitrogen and is an important raw material for the chemical industry.

 Names

Name urea
Synonym More Synonyms

 Urea Biological Activity

Description Urea is a powerful protein denaturant via both direct and indirect mechanisms[1]. A potent emollient and keratolytic agent[2]. Used as a diuretic agent. Blood urea nitrogen (BUN) has been utilized to evaluate renal function[3]. Widely used in fertilizers as a source of nitrogen and is an important raw material for the chemical industry.
Related Catalog
Target

Human Endogenous Metabolite

References

[1]. Bennion BJ, et al. The molecular basis for the chemical denaturation of proteins by urea. Proc Natl Acad Sci U S A. 2003 Apr 29;100(9):5142-7.

[2]. Pan M, et al. Urea: a comprehensive review of the clinical literature. Dermatol Online J. 2013 Nov 15;19(11):20392.

[3]. Wang H, et al. Urea. Subcell Biochem. 2014;73:7-29.

 Chemical & Physical Properties

Density 1.335
Boiling Point 332.48°C
Melting Point 131-135 ºC
Molecular Formula CH4N2O
Molecular Weight 60.055
Flash Point 53.7±22.6 °C
Exact Mass 60.032364
PSA 69.11000
LogP -1.43
Vapour Pressure <0.1 hPa (20 °C)
Index of Refraction n20/D 1.40
Storage condition 2-8°C
Stability Substances to be avoided include strong oxidizing agents. Protect from moisture.
Water Solubility 1080 g/L (20 ºC)

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
YR6250000
CHEMICAL NAME :
Urea
CAS REGISTRY NUMBER :
57-13-6
LAST UPDATED :
199710
DATA ITEMS CITED :
43
MOLECULAR FORMULA :
C-H4-N2-O
MOLECULAR WEIGHT :
60.07
WISWESSER LINE NOTATION :
ZVZ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
Standard Draize test
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Human
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
8471 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
>5 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
8200 mg/kg
TOXIC EFFECTS :
Behavioral - altered sleep time (including change in righting reflex) Behavioral - changes in motor activity (specific assay) Behavioral - antipsychotic
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
5300 mg/kg
TOXIC EFFECTS :
Behavioral - altered sleep time (including change in righting reflex) Behavioral - changes in motor activity (specific assay) Behavioral - antipsychotic
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intratracheal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
567 mg/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold Lungs, Thorax, or Respiration - dyspnea Blood - methemoglobinemia-carboxyhemoglobin
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
11 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
6608 mg/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold Behavioral - coma
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
9200 mg/kg
TOXIC EFFECTS :
Behavioral - altered sleep time (including change in righting reflex) Behavioral - changes in motor activity (specific assay) Behavioral - antipsychotic
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
4600 mg/kg
TOXIC EFFECTS :
Behavioral - altered sleep time (including change in righting reflex) Behavioral - changes in motor activity (specific assay) Behavioral - antipsychotic
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Mammal - dog
DOSE/DURATION :
3 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Mammal - dog
DOSE/DURATION :
3 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
3 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
4800 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Bird - pigeon
DOSE/DURATION :
14800 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Amphibian - frog
DOSE/DURATION :
600 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Mammal - domestic
DOSE/DURATION :
511 mg/kg
TOXIC EFFECTS :
Behavioral - tetany Lungs, Thorax, or Respiration - dyspnea Gastrointestinal - changes in structure or function of salivary glands
TYPE OF TEST :
TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
288 mg/m3/17W-I
TOXIC EFFECTS :
Kidney, Ureter, Bladder - other changes in urine composition Blood - other changes Nutritional and Gross Metabolic - changes in chlorine
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
3024 mg/kg/4W-C
TOXIC EFFECTS :
Liver - changes in liver weight Endocrine - changes in thymus weight Related to Chronic Data - changes in testicular weight
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
37800 mg/kg/25W-C
TOXIC EFFECTS :
Brain and Coverings - changes in brain weight Related to Chronic Data - changes in prostate weight
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
821 gm/kg/1Y-C
TOXIC EFFECTS :
Tumorigenic - neoplastic by RTECS criteria Blood - tumors Blood - lymphoma, including Hodgkin's disease
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
394 gm/kg/1Y-C
TOXIC EFFECTS :
Tumorigenic - Carcinogenic by RTECS criteria Blood - tumors Blood - lymphoma, including Hodgkin's disease
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intraplacental
DOSE :
1400 mg/kg
SEX/DURATION :
female 16 week(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - abortion
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intraplacental
DOSE :
1600 mg/kg
SEX/DURATION :
female 16 week(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - abortion
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intraplacental
DOSE :
1600 mg/kg
SEX/DURATION :
female 16 week(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - abortion
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intrauterine
DOSE :
6 gm/kg
SEX/DURATION :
female 18 week(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - abortion
TYPE OF TEST :
Cytogenetic analysis

MUTATION DATA

TYPE OF TEST :
Cytogenetic analysis
TEST SYSTEM :
Rodent - hamster Lung
DOSE/DURATION :
13 gm/L
REFERENCE :
GMCRDC Gann Monograph on Cancer Research. (Plenum Pub. Corp., 233 Spring St., New York, NY 10013) No. 11- 1971- Volume(issue)/page/year: 27,95,1981 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 80231 No. of Facilities: 22367 (estimated) No. of Industries: 156 No. of Occupations: 119 No. of Employees: 284911 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X7915 No. of Facilities: 9 (estimated) No. of Industries: 1 No. of Occupations: 1 No. of Employees: 63 (estimated) No. of Female Employees: 9 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 80231 No. of Facilities: 31269 (estimated) No. of Industries: 204 No. of Occupations: 164 No. of Employees: 783504 (estimated) No. of Female Employees: 326824 (estimated)

 Safety Information

Personal Protective Equipment Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Hazard Codes Xn,Xi
Risk Phrases 36/37/38-40
Safety Phrases S26-S36-S24/25
RIDADR NONH for all modes of transport
WGK Germany 1
RTECS YR6250000
HS Code 3102100001

 Synthetic Route

 Customs

HS Code 3102100001

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 Synonyms

Carbonyl diamide
diaminomethanal
Urea
UREUM
Carbamide
EINECS 200-315-5
MFCD00008022
carbonyl diamine
Urea (8CI,9CI)
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