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Substance Name: Cytosine
RN: 71-30-7
UNII: 8J337D1HZY
InChIKey: OPTASPLRGRRNAP-UHFFFAOYSA-N
Note
- A pyrimidine base that is a fundamental unit of nucleic acids.
Classification Code
- Mutation Data
Molecular Formula
- C4-H5-N3-O
Molecular Weight
- 111.1035
- All
- Links to Resources
- Names & Synonyms
- Registry Numbers
- Structure Descriptors
- Toxicity
- Physical Properties
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Names and Synonyms
Name of Substance
- Cytosine
MeSH Heading
- Cytosine
Synonyms
- 4-Amino-2(1H)-pyrimidinone
- 4-Amino-2-hydroxypyrimidine
- AI3-52281
- Cyt
- Cytosine
- Cytosinimine
- EC 200-749-5
- EINECS 200-749-5
- NSC 27787
- UNII-8J337D1HZY
Systematic Names
- 2(1H)-Pyrimidinone, 4-amino-
- 2(1H)-Pyrimidinone, 6-amino-
- Cytosine
Registry Numbers
CAS Registry Number
- 71-30-7
FDA UNII
- 8J337D1HZY
Other Registry Numbers
- 118511-36-7
- 1268833-99-3
- 149297-78-9
- 14987-28-1
- 26661-23-4
- 504-05-2
- 66322-75-6
- 66398-98-9
- 66460-16-0
- 66460-17-1
- 80275-67-8
- 88733-25-9
- 918399-36-7
System Generated Number
- 0000071307
Structure Descriptors
InChI
1S/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8)InChIKey
OPTASPLRGRRNAP-UHFFFAOYSA-NSmiles
n1c(cc[nH]c1=O)Toxicity
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD50 | intraperitoneal | > 2222mg/kg (2222mg/kg) | BEHAVIORAL: CHANGES IN MOTOR ACTIVITY (SPECIFIC ASSAY) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) | Journal of Pharmacology and Experimental Therapeutics. Vol. 207, Pg. 504, 1978. |
Physical Properties
| Physical Property | Value | Units | Temp (deg C) | Source |
|---|---|---|---|---|
| Melting Point | 322.5 dec | deg C | EXP | |
| log P (octanol-water) | -1.73E+00 | (none) | EXP | |
| Water Solubility | 8000 | mg/L | 25 | EXP |
| Vapor Pressure | 1.09E-03 | mm Hg | 25 | EST |
| Henry's Law Constant | 4.81E-11 | atm-m3/mole | 25 | EST |
| Atmospheric OH Rate Constant | 5.58E-11 | cm3/molecule-sec | 25 | EST |
Physical property data is provided to ChemIDplus by SRC, Inc.