Cytosine suppliers

Cytosine

CAS:: 71-30-7

MF:: C4H5N3O

MW:: 111.1

SecurityInformation

Symbol(GHS) ：: GHS07

Signal word ：: Warning

Hazard statements ：: H315-H319-H335

Precautionary statements ：: P305+P351+P338

Hazard Codes ：: Xi,Xn

Risk Statements ：: 36/37/38-20/21/22

Safety Statements ：: 26-36-37/39

WGK Germany ：: 1

RTECS ：: UW7350150

Hazard Note ：: Irritant

TSCA ：: Yes

HS Code ：: 29335910

Use：: Cytosine is first isolated by hydrolysis of calf thymus tissue by Albrecht Kossel (1853–1927) and A. Neumann during 1893–1894. Thymine’s structure was published in 1900 and confi rmed over the next several years when it was synthesized by several investigators. In 1903, cytosine was synthesized by Henry Lord Wheeler (1867–1914) and Treat B. Johnson, confirming its structure. Uracil was first isolated in 1900 from yeast nucleic acid found in bovine thymus and herring sperm.the methylation of uracil produces thymine; thymine is also called 5-methyluracil because methylation takes place at the fi fth carbon in uracil to produce thymine.

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