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cytosine

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Origin: China

Cas No: 71-30-7

Specification: 99%min

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CAS No.: 71-30-7 Formula: C4H5N3O Molecular Weight: 111.10200

Description

Cytosine (C) is one of the four main bases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA). It is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached (an amine group at position 4 and a keto group at position 2). The nucleoside of cytosine is cytidine. In Watson-Crick base pairing, it forms three hydrogen bonds with guanine.

Basic Info

Chemical Name	cytosine
Synonyms	2(1H)-Pyrimidinone, 4-amino-; Cyt; Cytosinimine; 4-aminopyrimidin-2-one; Cytosine; Cytosin;
CAS No.	71-30-7
Molecular Formula	C4H5N3O
Molecular Weight	111.10200
PSA	71.77000
LogP	-0.06670

Properties

Appearance & Physical State	white solid
Density	0.48
Boiling Point	445.8ºC at 760 mmHg
Melting Point	300ºC
Flash Point	223.4ºC
Refractive Index	1.688
Water Solubility	soluble
Stability	Stable. Incompatible with strong oxidizing agents.
Storage Condition	Store at RT.

Safety Info

RTECS	UW7350150
Safety Statements	S26-S36
HS Code	2933599090
WGK Germany	1
Risk Statements	R36/37/38
Hazard Codes	Xi

Synthesis Route

cytidine→aldehydo-D-ribose+cytosine
cytidine 2'-phosphate→cytosine+CYTIDINE 3'-MONOPHOSPHATE
6-(benzylamino)-1H-pyrimidin-2-one→cytosine

Toxicity

Exposure Route	Type of Test	Species Observed	Dose/Duration	Toxic Effects
Intraperitoneal	LD50 - Lethal dose, 50 percent kill	Rodent - mouse	>2222 mg/kg	1.Behavioral-somnolence (general depressed activity) 2.Behavioral-changes in motor activity (specific assay)

Precursor

4-(benzoylamino)-1-[N-(1,3-dipivaloyloxyprop-2-yl)acetylaminomethyl]-1H-pyrimidin-2-one
3-ETHOXYACRYLONITRILE
N4-[(Dimethylamino)methylene]cytosine
6-(benzylamino)-1H-pyrimidin-2-one

Downstream Product

5-bromouracil
5,6-dihydrouracil
6-amino-5-bromo-1H-pyrimidin-2-one
N-(Trimethylsilyl)-2-[(trimethylsilyl)oxy]pyrimidin-4-amine

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