(4-Methylphenyl)-1-(2H)-phthalazinone

$73 - $1143.68
Product name: (4-Methylphenyl)-1-(2H)-phthalazinone
CAS: 51334-85-1
MF: C15H12N2O
MW: 236.27
EINECS:
MDL Number:MFCD00222976
Synonyms:JRH-03702, (4-Methylphenyl)-1-(2H)-phthalazinone, 97%;2-(p-Tolyl)phthalazin-1(2H)-one;4-(4-methylphenyl)phthalazin-1(2H)-one;1(2H)-Phthalazinone, 4-(4-methylphenyl)-;(4-Methylphenyl)-1-(2H)-phthalazinone 95%;(4-Methylphenyl)-1-(2H<

Price25 Properties Safety Information Description

25 prices

Selected condition：

Brand

aablocks

ACHEMBLOCK

AK Scientific

American Custom Chemicals Corporation

Apolloscientific

Biosynth

Chemenu

Crysdot

Heterocyclics

Matrix Scientific

Package

250mg

500.00mg

500mg

1.00g

1g

2.5G

5g

10g

25g

100g

Manufactureraablocks

Product numberAA00DFXA

Product description4-(p-Tolyl)phthalazin-1(2H)-one ≥95%

Packaging5g

Price$77

Updated2026-05-28

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Manufactureraablocks

Product numberAA00DFXA

Product description4-(p-Tolyl)phthalazin-1(2H)-one ≥95%

Packaging25g

Price$277

Updated2026-05-28

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ManufacturerACHEMBLOCK

Product numberAD242247

Product description4-(p-Tolyl)phthalazin-1(2H)-one 95%

Packaging25G

Price$330

Updated2026-05-27

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ManufacturerAK Scientific

Product number4652AE

Product description4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one

Packaging500mg

Price$403

Updated2021-12-16

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ManufacturerAK Scientific

Product number4652AE

Product description4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one

Packaging1g

Price$492

Updated2021-12-16

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ManufacturerAmerican Custom Chemicals Corporation

Product numberCOR0002993

Product description4-PARA-TOLYLPHTHALAZIN-1(2H)-ONE 95.00%

Packaging1G

Price$597.45

Updated2021-12-16

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ManufacturerAmerican Custom Chemicals Corporation

Product numberCOR0002993

Product description4-PARA-TOLYLPHTHALAZIN-1(2H)-ONE 95.00%

Packaging2.5G

Price$958.94

Updated2021-12-16

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ManufacturerAmerican Custom Chemicals Corporation

Product numberCOR0002993

Product description4-PARA-TOLYLPHTHALAZIN-1(2H)-ONE 95.00%

Packaging5G

Price$1143.68

Updated2021-12-16

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ManufacturerApolloscientific

Product numberOR32943

Product description4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 97%

Packaging500mg

Price$160

Updated2026-06-04

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ManufacturerApolloscientific

Product numberOR32943

Product description4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 97%

Packaging1g

Price$252

Updated2026-06-04

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ManufacturerApolloscientific

Product numberOR32943

Product description4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 97%

Packaging5g

Price$1132

Updated2026-06-04

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ManufacturerBiosynth

Product numberBCA33485

Product description4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one

Packaging10g

Price$375

Updated2026-06-04

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ManufacturerChemenu

Product numberCM275233

Product description4-(p-tolyl)phthalazin-1(2H)-one 95%

Packaging5g

Price$73

Updated2026-05-26

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ManufacturerChemenu

Product numberCM275233

Product description4-(p-tolyl)phthalazin-1(2H)-one 95%

Packaging25g

Price$254

Updated2026-05-26

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ManufacturerChemenu

Product numberCM275233

Product description4-(p-tolyl)phthalazin-1(2H)-one 95%

Packaging1g

Price$307

Updated2021-12-16

Buy

ManufacturerCrysdot

Product numberCD11112952

Product description2-(p-Tolyl)phthalazin-1(2H)-one 95+%

Packaging1g

Price$325

Updated2026-05-26

Buy

Manufacturer Product number Product description Packaging Price Updated Buy

aablocks AA00DFXA 4-(p-Tolyl)phthalazin-1(2H)-one ≥95% 5g $77 2026-05-28 Buy

aablocks AA00DFXA 4-(p-Tolyl)phthalazin-1(2H)-one ≥95% 25g $277 2026-05-28 Buy

ACHEMBLOCK AD242247 4-(p-Tolyl)phthalazin-1(2H)-one 95% 25G $330 2026-05-27 Buy

AK Scientific 4652AE 4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 500mg $403 2021-12-16 Buy

AK Scientific 4652AE 4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 1g $492 2021-12-16 Buy

American Custom Chemicals Corporation COR0002993 4-PARA-TOLYLPHTHALAZIN-1(2H)-ONE 95.00% 1G $597.45 2021-12-16 Buy

American Custom Chemicals Corporation COR0002993 4-PARA-TOLYLPHTHALAZIN-1(2H)-ONE 95.00% 2.5G $958.94 2021-12-16 Buy

American Custom Chemicals Corporation COR0002993 4-PARA-TOLYLPHTHALAZIN-1(2H)-ONE 95.00% 5G $1143.68 2021-12-16 Buy

Apolloscientific OR32943 4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 97% 500mg $160 2026-06-04 Buy

Apolloscientific OR32943 4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 97% 1g $252 2026-06-04 Buy

Apolloscientific OR32943 4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 97% 5g $1132 2026-06-04 Buy

Biosynth BCA33485 4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 10g $375 2026-06-04 Buy

Chemenu CM275233 4-(p-tolyl)phthalazin-1(2H)-one 95% 5g $73 2026-05-26 Buy

Chemenu CM275233 4-(p-tolyl)phthalazin-1(2H)-one 95% 25g $254 2026-05-26 Buy

Chemenu CM275233 4-(p-tolyl)phthalazin-1(2H)-one 95% 1g $307 2021-12-16 Buy

Crysdot CD11112952 2-(p-Tolyl)phthalazin-1(2H)-one 95+% 1g $325 2026-05-26 Buy

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Properties

Melting point :250-255 °C(lit.)
Density :1.215±0.14 g/cm3(Temp: 25 °C; Press: 760 Torr)(predicted)
storage temp. :Store at room temperature
pka :11.924±0.40(predicted)
Appearance :White to off-white Solid

Safety Information

Symbol(GHS):

Signal word: Warning

Hazard statements:

Code Hazard statements Hazard class Category Signal word Pictogram P-Codes

H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362

H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P

H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning

Precautionary statements:

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Description

More related product prices
51334-86-2 5004-45-5 1(2H)-Phthalazinone, 4-(4-fluorophenyl)- 76462-38-9

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Suppliers and manufacturers

Shanghai Hanhong Scientific Co.,Ltd. Tianjin heowns Biochemical Technology Co., Ltd. Shanghai Xingui Biotechnology Co., Ltd. Shanghai YuanYe Biotechnology Co., Ltd. Changzhou Hopschain Chemical Co.,Ltd. Amadis Chemical Company Limited Shanghai Rlavie Technology Co., Ltd. Career Henan Chemica Co Tianjin Nuokang Pharmaceutical Technology Co., Ltd. Guangzhou Yuheng Pharmaceutical Technology Co., Ltd

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Manufacturer	Product number	Product description	Packaging	Price	Updated	Buy
aablocks	AA00DFXA	4-(p-Tolyl)phthalazin-1(2H)-one ≥95%	5g	$77	2026-05-28	Buy
aablocks	AA00DFXA	4-(p-Tolyl)phthalazin-1(2H)-one ≥95%	25g	$277	2026-05-28	Buy
ACHEMBLOCK	AD242247	4-(p-Tolyl)phthalazin-1(2H)-one 95%	25G	$330	2026-05-27	Buy
AK Scientific	4652AE	4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one	500mg	$403	2021-12-16	Buy
AK Scientific	4652AE	4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one	1g	$492	2021-12-16	Buy
American Custom Chemicals Corporation	COR0002993	4-PARA-TOLYLPHTHALAZIN-1(2H)-ONE 95.00%	1G	$597.45	2021-12-16	Buy
American Custom Chemicals Corporation	COR0002993	4-PARA-TOLYLPHTHALAZIN-1(2H)-ONE 95.00%	2.5G	$958.94	2021-12-16	Buy
American Custom Chemicals Corporation	COR0002993	4-PARA-TOLYLPHTHALAZIN-1(2H)-ONE 95.00%	5G	$1143.68	2021-12-16	Buy
Apolloscientific	OR32943	4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 97%	500mg	$160	2026-06-04	Buy
Apolloscientific	OR32943	4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 97%	1g	$252	2026-06-04	Buy
Apolloscientific	OR32943	4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one 97%	5g	$1132	2026-06-04	Buy
Biosynth	BCA33485	4-(4-Methylphenyl)-1,2-dihydrophthalazin-1-one	10g	$375	2026-06-04	Buy
Chemenu	CM275233	4-(p-tolyl)phthalazin-1(2H)-one 95%	5g	$73	2026-05-26	Buy
Chemenu	CM275233	4-(p-tolyl)phthalazin-1(2H)-one 95%	25g	$254	2026-05-26	Buy
Chemenu	CM275233	4-(p-tolyl)phthalazin-1(2H)-one 95%	1g	$307	2021-12-16	Buy
Crysdot	CD11112952	2-(p-Tolyl)phthalazin-1(2H)-one 95+%	1g	$325	2026-05-26	Buy