Detail of "1820-81-1"

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CAS Number:
1820-81-1
Name:
5-Chlorouracil
Molecular Structure:
Formula:
C₄H₃ClN₂O₂
Molecular Weight:
146.53
Synonyms:
2,4 (1H,3H)-Pyrimidinedione, 5-chloro-;2,4(1H,3H)-Pyrimidinedione, 5-chloro-;Uracil, 5-chloro- (VAN) (8CI);Uracil, 5-chloro-;5-Chloro-2,4-pyrimidinedione;5-Chlorouracil,5-Chloro-2,4-dihydroxypyrimidine;
EINECS:
217-339-7
Density:
1.61 g/cm³
Melting Point:
>300 °C(lit.)
Boiling Point:
413.6 °C at 760 mmHg
Flash Point:
203.9 °C
Solubility:
slightly soluble in water
Appearance:
white to light beige crystalline powder
Hazard Symbols:
Xi
Risk Codes:
36/37/38
Safety:
22-24/25-36-26 Details

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Reference

The kinetics and primary products of uracil chlorination: The kinetics and primary products of uracil chlorination. Gould, J. P.; Richards, J. T.; Miles, M. G. (Sch. Civil Eng., Georgia Inst. Technol., Atlanta, GA 30332, USA). Water Res., 18(2), 205-12 (English) 1984. CODEN: WATRAG. ISSN: 0043-1354. DOCUMENT TYPE: Journal CA Section: 61 (Water) Chlorination of Uracil (I) [66-22-8] in water at free available Cl: I ratios 31 followed mixed 2nd order kinetics, was pH dependent, and produced dichlorouracil [88707-90-8], whereas at lower Cl:I ratios mutagenic 5-chlorouracil [1820-81-1] was formed.

Effects of selected wastewater chlorination products and captan on marine algae: Effects of selected wastewater chlorination products and captan on marine algae. Sikka, Harish C.; Butler, Gary L. (Syracuse Res. Corp., Syracuse, N. Y., USA). U. S. Environ. Prot. Agency, Off. Res. Dev., [Rep.] EPA, EPA-600/3-77-029, 38 pp. (English) 1977. CODEN: XPARD6. DOCUMENT TYPE: Report CA Section: 4 (Toxicology) 3-Chlorobenzoic acid (I) [535-80-8] (1 or 10 ppm) had either slight or no effect on growth of Dunaliella or Porphyridium. It inhibited growth of Skeletonema at 10 ppm, but had no marked effect at 1 ppm. 5-Chlorouracil [1820-81-1] at 1 or 10 ppm did not affect Skeletonema, but stimulated growth of Dunaliella initially. 4-Chlororesorcinol [95-88-5] had no effect on Dunaliella at 1 ppm, but 10 ppm of the chem. caused a small decrease in growth. The chem. produced an initial stimulation in growth of Porphyridium, followed by an inhibition. Growth of Skeletonema was inhibited by 4-chlororescorcinol at concns. ranging from 1 to 10 ppm. Treatment with 3-chlorophenol [108-43-0] stimulated growth of Dunaliella. Skeletonema growth was inhibited at concns. higher than 2.5 ppm, but showed some stimulation at 1 ppm. At 1 ppm it stimulated the growth of Porphyridium, but was slightly inhibitory at 5 ppm. A combination of 3-chlorophenol and 4-chlororesorcinol interacted synergistically to reduce Skeletonema growth. Captan [133-06-2] suppressed the growth of Dunaliella and Porphyridium at a concn. of 5 ppm. Slight stimulation in growth of the two organisms was noticed in the presence of 0.1 and 1 ppm of the fungicide. Captan was inhibitory to Skeletonema at concns. ranging from 0.25 to 5 ppm. Treatment of Skeletonema with 0.5 ppm of captan for 30 min caused a substantial decrease in photosynthetic activity.

Detail of "1820-81-1"

5-Chlorouracil

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Reference