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2-Chloro-4-amino-6,7-dimethoxyquinazoline

2-Chloro-4-amino-6,7-dimethoxyquinazoline structure

CAS No.: 23680-84-4

Chemical Name:: 2-Chloro-4-amino-6,7-dimethoxyquinazoline

Synonyms: 2-CHLORO-6,7-DIMETHOXYQUINAZOLIN-4-AMINE;4-AMINO-2-CHLORO-6,7-DIMETHOXYQUINAZOLINE;QUINAZOLINAMINE;2-CHLORO-6,7-DIMETHOXY-4-QUINAZOLINAMINE;ACDQ;Terazosin-001;2-Chloro-4-AMino-6;TIMTEC-BB SBB000787;Prazosin EP Impurity A;7-DiMethoxy-Quinazoline

CBNumber:: CB8264136

Molecular Formula:: C10H10ClN3O2

Molecular Weight:: 239.66

MDL Number:: MFCD00051734

MOL File:: 23680-84-4.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-05-28 05:41:41

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2-Chloro-4-amino-6,7-dimethoxyquinazoline Properties

Melting point	262-268 °C (dec.)(lit.)
Boiling point	374.0±42.0 °C(Predicted)
Density	1.5062 (rough estimate)
vapor pressure	0Pa at 25℃
refractive index	1.5500 (estimate)
storage temp.	2-8°C
solubility	DMSO (Sparingly, Heated), Methanol (Slightly, Heated)
form	Solid
pka	4.35±0.30(Predicted)
color	White to Off-White
Water Solubility	1.418g/L at 25℃
BRN	747463
Major Application	pharmaceutical (small molecule)
InChI	1S/C10H10ClN3O2/c1-15-7-3-5-6(4-8(7)16-2)13-10(11)14-9(5)12/h3-4H,1-2H3,(H2,12,13,14)
InChIKey	HWIIAAVGRHKSOJ-UHFFFAOYSA-N
SMILES	COc1cc2nc(Cl)nc(N)c2cc1OC
LogP	1.5 at 25℃
CAS DataBase Reference	23680-84-4(CAS DataBase Reference)
FDA UNII	FG7Z4T71Y4
NIST Chemistry Reference	4-Amino-2-chloro-6,7-dimethoxyquinazoline(23680-84-4)
UNSPSC Code	41116107
NACRES	NA.24

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07

Signal word

Warning

Hazard statements

H315-H319-H335

Precautionary statements

P261-P305+P351+P338

target organs

Respiratory system

Hazard Codes

Xi,Xn

Risk Statements

36/37/38-20/21/22

Safety Statements

26-36-37/39

WGK Germany

HazardClass

IRRITANT

HS Code

29339900

Storage Class

13 - Non Combustible Solids

Hazard Classifications

Eye Irrit. 2
Skin Irrit. 2
STOT SE 3

REACH Registrations

Active

NFPA 704

	1
2		0

2-Chloro-4-amino-6,7-dimethoxyquinazoline price More Price(68)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	Y0000552	Doxazosin impurity F European Pharmacopoeia (EP) Reference Standard	23680-84-4	15 mg	$241	2026-04-30	Buy
Sigma-Aldrich	PHR3308	Doxazosin Related Compound C certified reference material, pharmaceutical secondary standard	23680-84-4	50MG	$704	2026-04-30	Buy
Sigma-Aldrich	518654	4-Amino-2-chloro-6,7-dimethoxyquinazoline 95%	23680-84-4	25g	$91.4	2026-04-30	Buy
Sigma-Aldrich	1225452	Doxazosin Related Compound C United States Pharmacopeia (USP) Reference Standard	23680-84-4	20mg	$1390	2026-04-30	Buy
TCI Chemical	A2151	4-Amino-2-chloro-6,7-dimethoxyquinazoline >98.0%(HPLC)(N)	23680-84-4	5g	$42	2026-04-30	Buy

Product number	Packaging	Price	Buy
Y0000552	15 mg	$241	Buy
PHR3308	50MG	$704	Buy
518654	25g	$91.4	Buy
1225452	20mg	$1390	Buy
A2151	5g	$42	Buy

2-Chloro-4-amino-6,7-dimethoxyquinazoline Chemical Properties, Uses, Production

Chemical Properties

Off-White Solid

Uses

Intermediate in the production on Terazosin.

Synthesis Reference(s)

Journal of Medicinal Chemistry, 20, p. 146, 1977 DOI: 10.1021/jm00211a031

Flammability and Explosibility

Non flammable

2-Chloro-4-amino-6,7-dimethoxyquinazoline synthesis

Synthesis of 2-Chloro-4-amino-6,7-dimethoxyquinazoline from 157459-53-5

2-Chloro-4-amino-6,7-dimethoxyquinazoline Preparation Products And Raw materials

Raw materials

Urea, N-cyano-N'-(3,4-dimethoxyphenyl)- 4-Quinazolinamine, 2-chloro-5-iodo-6,7-dimethoxy- 157459-53-5 6,7-Dimethoxyquinazoline-2,4-dione 3,4-Dimethoxy-6-nitrobenzamide

4,5-Dimethoxy-2-nitrobenzoic acid 4-Aminoveratrole 2-Amino-4,5-dimethoxybenzamide 2,4-Dichloroquinazoline Methyl 3,4-dimethoxybenzoate

2,4-Dichloro-6,7-dimethoxyquinazoline Methyl 2-amino-4,5-dimethoxybenzoate Methyl 4,5-dimethoxy-2-nitrobenzoate

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Preparation Products

Alfuzosin ({3-[(4-Amino-6,7-dimethoxy-2-quinazolinyl)(methyl)amino]propyl}amino)(2-furyl)methanol Doxazosin hydrochloride

2-Chloro-4-amino-6,7-dimethoxyquinazoline Suppliers

Global Suppliers ( 540)

Supplier	Tel	Email	Country	ProdList	Advantage
Ningbo jinuo chemical co., LTD	0574-87314919 057487319282	info@nbinno.com	China	7046	58
Hangzhou Bright Pharma Biotechnology Co., Ltd.	0571-85775770 13575490453	info@brightpharmabio.com	China	33	58
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	4006356688 18621169109	market03@meryer.com	China	40202	62
INTATRADE GmbH	+49 3493/605464	sales@intatrade.de	Germany	3563	66
3B Pharmachem (Wuhan) International Co.,Ltd.	18930552037	3bsc@sina.com	China	15813	69
Alfa Aesar	400-6106006	saleschina@alfa-asia.com	China	30103	84
TAIYUAN RHF CO.,LTD.	+86 351 7031519	sales@RHFChem.com	China	2334	56
TCI (Shanghai) Development Co., Ltd.	021-67121386	Sales-CN@TCIchemicals.com	China	24512	81
Ark Pharm, Inc.	847-367-3680	sales@arkpharminc.com	United States	1669	56

Supplier	Advantage
Ningbo jinuo chemical co., LTD	58
Hangzhou Bright Pharma Biotechnology Co., Ltd.	58
J & K SCIENTIFIC LTD.	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	62
INTATRADE GmbH	66
3B Pharmachem (Wuhan) International Co.,Ltd.	69
Alfa Aesar	84
TAIYUAN RHF CO.,LTD.	56
TCI (Shanghai) Development Co., Ltd.	81
Ark Pharm, Inc.	56

View Latest Price from 2-Chloro-4-amino-6,7-dimethoxyquinazoline manufacturers

Update time	Product	Min. Order	Purity	Supply Ability	Manufacturer
2026-08-07	4-Amino-2-chloro-6,7-dimethoxyquinazoline 23680-84-4	1kG	99%	1000KG	Shaanxi Dideu Medichem Co. Ltd
2026-06-30	2-Chloro-4-amino-6,7-dimethoxyquinazoline 23680-84-4	1KG	98	10000KGS	Shaanxi Dideu New Materials Co. Ltd
2025-11-19	2-Chloro-4-amino-6,7-dimethoxyquinazoline 23680-84-4	1kg	98%	200kg	Shanghai Joiny Pharmaceutical Co.,LTD

4-Amino-2-chloro-6,7-dimethoxyquinazoline
23680-84-4
99%
Shaanxi Dideu Medichem Co. Ltd

2-Chloro-4-amino-6,7-dimethoxyquinazoline
23680-84-4
98
Shaanxi Dideu New Materials Co. Ltd

2-Chloro-4-amino-6,7-dimethoxyquinazoline
23680-84-4
$0.00
98%
Shanghai Joiny Pharmaceutical Co.,LTD

23680-84-4 (2-Chloro-4-amino-6,7-dimethoxyquinazoline) Related Search:

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Tris(hydroxymethyl)aminomethane Glycine Aminoethoxyvinyl glycine hydrochloride Terazosin impurity 2-Piperazine-4-amino-6,7-dimethoxyquinazoline

(R)-Terazosin 2,2'-(1,4-Piperazinediyl)bis[6,7-diMethoxy-4-quinazolinaMine] 1-[4-(4-AMino-6,7-diMethoxy-2-quinazolinyl)-1-piperazinyl]-5-hydroxy-1-pentanone

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QUINAZOLINAMINE TIMTEC-BB SBB000787 4-Quinazolinamine, 2-chloro-6,7-dimethoxy- 4-AMINO-2-CHLORO-6,7-DIMETHOXYQUINOZOLINE 4-AMINO-2-CHLORO-6,7-DIMETHOXY-QUINZOLINE 2-CHLORO-4-AMINO-6,7-DIMETHOXYQUINAZOLINE 2-CHLORO-6,7-DIMETHOXY-4-AMINOQUINAZOLINE 2-CHLORO-6,7-DIMETHOXY-4-QUINAZOLINAMINE 2-CHLORO-6,7-DIMETHOXYQUINAZOLIN-4-AMINE 2-CHLORO-6,7-DIMETHOXY-QUINAZOLIN-4-YLAMINE 2-CHLORO-6,7-DIMETHOXYQUINAZOLINE-4-AMINE 2-Chloro-4-amino-6,7-dimethoxy 4-Amino-2-chloro-6,7-dimethoxy 2-chloro-4-amino-6,7-dimethoxyquinazoline (intermediate of terazosin) 2-CHLORO-4-AMINO-6,7-DIMETHOXYLQUINAZOLINE 4-Amino-2-chloro-6,7-dimethoxy quinezoline 4-AMINO-2-CHLOR-6,7-DIMETHOXY-CHINAZOLIN 4-Amino-2-Chloro-6,7-Dimethoxyquinoline 2-Chloro-4-Amino-6,7-Dimethoxyquinazoline99% 4-Amino-2-chloro-6,7-dimethoxyquinazoline, 98+% Prazosin EP Impurity A Terazosin-001 Terazosin Impurity 1(Terazosin EP Impurity A) 4-AMINO-2-CHLORO-6,7-DIMETHOXYQUINAZOLINE/ MOLSIDOMINE 2-Chloro-4-amino-6,7-dimethoxyquinazoline, 4-Amino-2-chloro-6,7-dimethoxyquinazoline, 2-Chloro-6,7-dimethoxyquinazolin-4-amine 4-AMINO-2-CHLORO-6,7-DIMETHOXYQUINAZOLINE 99.5% 2-Chloro-4-amino-6,7-dimetoxysynazaline 2-CHLORO-4-AMINO-6,7-DIMETHOXYQUINAZOLINETERAZOSIN 2-chloro-4-amino-6,7-dimetoxy quinazoline 4-Amino-2-chloro-6,7-dimethoxyquinazoline,97% 6,7-Dimethyoxy-2-chloro-4-quinazolinamine 2-Chloro-4-AMino-6 7-DiMethoxy-Quinazoline Doxazosin Related Compound C (20 mg) (2-chloro-4-amino-6,7-dimethoxyquinazoline) 4-AMino-2-chloro-6,7-diMethoxyquinazolin Terazosin EP IMpurity A Doxazosin Related CoMpound C Doxazosin EP Impurity F Alfuzosin EP Impurity B Alfuzosin Impurity 2（Alfuzosin EP Impurity B） AMINO-2-CHLORO-6,7-DIMETHOXYQUINAZOLINE 2-Chlor-6,7-dimethoxychinazolin-4-amin Doxazosin Impurity 6（Doxazosin EP Impurity F） 2-Chloro-4-amino-6,7-dimethoxyquinazoline Factory in stock Terazosin Hydrochloride Impurity Ⅱ：2-Chloro-4-amino-6,7-dimethoxyquinazoline 2-chloro-6,7-dimethyl-4-quinazolinamine Prazosin Impurity 1(Prazosin EP Impurity A) Terazosin EP Impurity A (Alfuzosin EP Impurity B, Prazosin EP Impurity A) Prazosin EP Impurity A (Terazosin EP Impurity A) Terazosin impurity A CRS 4-Amino-2-chloro-6,7-dimethoxyquinazoline > Doxazosin impurity F CRS 2-Chloro-6,7-dimethoxyquinazolin-4- 4-Amino-2-Chloro-6,7-Dimetoxy Quinazoline Terazosin EP Impurity A （Doxazosin EP Impurity F） DOXAZOSIN IMPURITY F USP/EP/BP 2-Chloro-4-amino-6,7-dimethoxyquinazoline ISO 9001：2015 REACH Doxazosin EP Impurity F/ Doxazosin Related Compund C (Terazosin EP Impurity A/ Prazosin EP Impurity A/ Alfuzosin EP Impurity B)