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CAS 51-21-8 5-Fluorouracil molecular structure lightbox
CAS RN: 51-21-8

5-Fluorouracil

Product Availability

Choose a grade to view its available package options.

8 package records8 with current stock2 grade groups
Batch No.PackageAvailabilityWarehouseInquiry
Batchno.20251127 100g In stock Shanghai, Shenzhen, Tianjin Inquiry
Batchno.20250120 1g In stock Shanghai Inquiry
Batchno.20260421 1kg In stock Shanghai, Tianjin Inquiry
Batchno.20260415 250mg In stock Shanghai Inquiry
Batchno.20250505 25g In stock Shanghai, Shenzhen, Tianjin, Wuhan, Chengdu Inquiry
Batchno.20250821 500g In stock Shanghai, Tianjin, Wuhan, Chengdu Inquiry
Batchno.20250909 50mg In stock Shanghai Inquiry
Batch No.PackageAvailabilityWarehouseInquiry
Batchno.20251031 5g / 25g / 100g Confirm by inquiry Shanghai, Shandong, Guangdong, Chongqing, Hebei Inquiry
  • Product code: SSC-157749
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Verified Factory Data

Supply Overview & Packaging Options

Packaging options, recorded purity, stock quantity and ship-from location below are generated from the current factory data table for this CAS.

  • Pack sizes on record: 5g, 10g, 25g, 100g, 500g
  • Available purity: >97%
  • Inventory rows with stock: 5
  • Bulk packaging: confirmed by inquiry
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Available Pack Sizes & Stock

Specific stock quantities are shown below. Price is not displayed online and is confirmed by inquiry.

Recorded sizes, purity and stock details for CAS 51-21-8
Pack Size Recorded Purity Available Qty Ship From Inquiry
5g >97% 5 In Stock Hong Kong Inquiry
10g >97% 5 In Stock Beijing Inquiry
25g >97% 5 In Stock Shenzhen Inquiry
100g >97% 5 In Stock Shenzhen Inquiry
500g >97% 5 In Stock Hong Kong Inquiry

51-21-8 / 5-fluoro-1H-pyrimidine-2,4-dione

Standard CAS: 51-21-8 Multi CAS: Yes
Basic Information Physical Properties Computed Properties

Basic Information

CAS
51-21-8
Multi CAS
Yes
Molecular Formula
C4FH3N2O2
Molecular Weight
130.080000
Exact Mass
130.017856
InChI
InChI=1S/C4H3FN2O2/c5-2-1-6-4(9)7-3(2)8/h1H,(H2,6,7,8,9)
InChIKey
GHASVSINZRGABV-UHFFFAOYSA-N

Physical Properties

Melting Point
Decomposes at 540-541 °F (EPA, 1998) 282-283 282 °C (decomposes) 280 - 282 °C
Boiling Point
Decomposes at 282-283 °C; sublimes (0.1 mm): 190-200 °C
Physical Description
Fluorouracil is a white to nearly white crystalline powder; practically odorless. Used as an anti neoplastic drug, chemosterilant for insects. (EPA, 1998) Solid
Appearance
White to practically white crystalline powder Crystals from water or methanol-ether
State
Solid

Computed Properties

Structural Parameters

Heavy atom count
9
Aromatic heavy atom count
6
H-bond acceptors
2
H-bond donors
2
Molar refractivity
27.64
TPSA
65.72

LogP / Solubility

WLOGP
-0.8
MLOGP
-0.71
XLogP3
-0.9
Consensus LogP
-0.8
Log S (ESOL)
-0.64
Class (ESOL)
Very soluble
Log S (Ali)
-0.05
Class (Ali)
Very soluble
Log S (SILICOS-IT)
0.16
Class (SILICOS-IT)
Highly soluble

ADME

GI absorption
Low
BBB permeant
Yes
P-gp substrate
No
CYP1A2 inhibitor
No
CYP2C19 inhibitor
No
CYP2C9 inhibitor
No
CYP2D6 inhibitor
No
CYP3A4 inhibitor
No
Log Kp (skin permeation)
-4.08

Drug-likeness / Medicinal Chemistry

Lipinski
Yes
Ghose
No
Veber
Yes
Egan
Yes
Muegge
No
Bioavailability score
0.55
Leadlikeness
No
Synthetic Accessibility
1.5

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