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2,4-Dibromopyrimidine

2,4-Dibromopyrimidine structure

CAS No.: 3921-01-5

Chemical Name:: 2,4-Dibromopyrimidine

Synonyms: 2,4-Dibromopyrimidine;2,4-Dibromo-1,3-diazine;Pyrimidine, 2,4-dibromo-;2,4-Dibromopyrimidine 95%;2,4-Dibromopyrimidine ,97%;2,4-Dibromopyrimidine, CAS 3921-01-5;2,4-DIBROMOPYRIMIDINE ISO 9001：2015 REACH

CBNumber:: CB6547684

Molecular Formula:: C4H2Br2N2

Molecular Weight:: 237.88

MDL Number:: MFCD06798232

MOL File:: 3921-01-5.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-09-12 18:54:19

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2,4-Dibromopyrimidine Properties

Melting point	65-67 °C
Boiling point	316.6±34.0 °C(Predicted)
Density	2.197
refractive index	1.615
storage temp.	under inert gas (nitrogen or Argon) at 2–8 °C
form	solid
pka	-3.17±0.20(Predicted)
color	Pale yellow

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07

Signal word

Warning

Hazard statements

H315-H319-H335

Precautionary statements

P261-P280a-P304+P340-P305+P351+P338-P405-P501a

Hazard Codes

Risk Statements

36/37/38

Safety Statements

26-37

HazardClass

IRRITANT, KEEP COLD, STORED UNDER ARGON

HS Code

29335990

NFPA 704

	1
2		0

2,4-Dibromopyrimidine price More Price(75)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Usbiological	230878	2,4-Dibromopyrimidine	3921-01-5	250mg	$229	2026-06-03	Buy
Usbiological	230878	2,4-Dibromopyrimidine	3921-01-5	1g	$303	2026-06-03	Buy
Usbiological	230878	2,4-Dibromopyrimidine	3921-01-5	5g	$821	2026-06-03	Buy
AstaTech	37120	2,4-DIBROMOPYRIMIDINE 97%	3921-01-5	1G	$45	2026-04-30	Buy
AstaTech	37120	2,4-DIBROMOPYRIMIDINE 97%	3921-01-5	5G	$135	2026-04-30	Buy

Product number	Packaging	Price	Buy
230878	250mg	$229	Buy
230878	1g	$303	Buy
230878	5g	$821	Buy
37120	1G	$45	Buy
37120	5G	$135	Buy

2,4-Dibromopyrimidine Chemical Properties, Uses, Production

Chemical Properties

White power

Synthesis

66-22-8

3921-01-5

The general procedure for the synthesis of 2,4-dibromopyrimidine from pyrimidine-2,4(1H,3H)-dione was as follows: phosphorus bromide (40.13 g, 0.14 mol) was mixed with uracil (3 g, 0.027 mol) and the reaction was stirred for 2 hr at 125 °C. After completion of the reaction, it was cooled to room temperature and the reaction mixture was slowly poured into 500 g of ice water and neutralized with solid sodium bicarbonate. Subsequently, the aqueous phase was extracted twice with 150 ml of dichloromethane. The organic phases were combined, dried and concentrated under reduced pressure to give 6.2 g of crude product. Finally, the crude product was purified by fast silica gel column chromatography to give 5 g of white solid product in 78.5% yield.

References

[1] Patent: CN106632077, 2017, A. Location in patent: Paragraph 0017; 0018; 0019; 0025; 0026; 0027; 0032-0034
[2] Journal of Heterocyclic Chemistry, 2005, vol. 42, # 4, p. 509 - 513
[3] Journal of Heterocyclic Chemistry, 1995, vol. 32, # 4, p. 1159 - 1163

2,4-Dibromopyrimidine synthesis

Synthesis of 2,4-Dibromopyrimidine from Uracil

2,4-Dibromopyrimidine Preparation Products And Raw materials

Raw materials

Phosphorus oxybromide Ethyl acetate Sodium bicarbonate Dichloromethane Uracil

Petroleum ether 2-Bromopyrimidine 2,4-Dichloropyrimidine

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Preparation Products

2,4-Dibromopyrimidine Suppliers

Global Suppliers ( 134)

Supplier	Tel	Email	Country	ProdList	Advantage
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
PharmaBlock Sciences (Nanjing),Inc.	025-86918202 4000255188	sales@pharmablock.com	China	5000	55
Alfa Aesar	400-6106006	saleschina@alfa-asia.com	China	30103	84
Energy Chemical	400-0056266	sales8178@energy-chemical.com	China	44850	61
Capot Chemical Co., Ltd	+86 (0) 571 85 58 67 18		China	18187	66
Jia Xing Isenchem Co.,Ltd	0573-85285100 18627885956	isenchem@163.com	China	9389	66
Pure Chemistry Scientific Inc.	001-857-928-2050 or 1-888-588-9418	sales@chemreagents.com	United States	10174	62
Nanjing Chemlin Chemical Co., Ltd	025-83697070 13770331960	info@chemlin.com.cn	China	16305	64
Shanghai Hanhong Scientific Co.,Ltd.	021-54306202 13764082696	info@hanhongsci.com	China	42917	64
Chemsky（shanghai）International Co.,Ltd.	021-50135380	shchemsky@sina.com	China	32273	50

Supplier	Advantage
J & K SCIENTIFIC LTD.	76
PharmaBlock Sciences (Nanjing),Inc.	55
Alfa Aesar	84
Energy Chemical	61
Capot Chemical Co., Ltd	66
Jia Xing Isenchem Co.,Ltd	66
Pure Chemistry Scientific Inc.	62
Nanjing Chemlin Chemical Co., Ltd	64
Shanghai Hanhong Scientific Co.,Ltd.	64
Chemsky（shanghai）International Co.,Ltd.	50

View Latest Price from 2,4-Dibromopyrimidine manufacturers

Image	Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
	2026-09-02	2,4-DIBROMOPYRIMIDINE 3921-01-5	$5.00	1KG	98%		Henan Fengda Chemical Co., Ltd
	2024-08-15	2,4-DIBROMOPYRIMIDINE 3921-01-5	$1.00	1KG	99%	20T	Shaanxi Dideu Medichem Co. Ltd

2,4-DIBROMOPYRIMIDINE
3921-01-5
$5.00
98%
Henan Fengda Chemical Co., Ltd

2,4-DIBROMOPYRIMIDINE
3921-01-5
$1.00
99%
Shaanxi Dideu Medichem Co. Ltd

2,4-Dibromopyrimidine Spectrum

2,4-DIBROMOPYRIMIDINE(3921-01-5)¹HNMR

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2,4-Dibromopyrimidine 95% 2,4-Dibromopyrimidine ,97% 2,4-Dibromopyrimidine 2,4-Dibromo-1,3-diazine Pyrimidine, 2,4-dibromo- 2,4-DIBROMOPYRIMIDINE ISO 9001：2015 REACH 2,4-Dibromopyrimidine, CAS 3921-01-5 3921-01-5 392-11-5 Heterocycle-Pyrimidine series alkyl bromide Halides Pyrazines, Pyrimidines & Pyridazines Pyrimidine Pyrazines, Pyrimidines & Pyridazines