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ChemicalBook >> CAS DataBase List >> 4-Chloro-1,2-dihydrophthalazin-1-one

4-Chloro-1,2-dihydrophthalazin-1-one

4-Chloro-1,2-dihydrophthalazin-1-one price.
  • $15 - $1430
  • Product name: 4-Chloro-1,2-dihydrophthalazin-1-one
  • CAS: 2257-69-4
  • MF: C8H5ClN2O
  • MW: 180.59
  • EINECS:
  • MDL Number:MFCD00102192
  • Synonyms:AURORA KA-6768;1-Chlorophtalazin-4-one ;1-CHLOROPHTHALAZIN-4-ONE;1-CHLORO-4-PHTHALAZINONE;4-Chloro-1(2H)-phthalazinone, 98%;4-chloro-1-phthalazinol(SALTDATA: FREE);4-chloro-2H-phthalazin-1-one;1-Chloro-3,4-dihydrophthalazin-4-one
Price46 Properties Safety Information Description
46 prices
Selected condition：
Brand
  • aablocks
  • ACHEMBLOCK
  • Activate Scientific
  • Alichem
  • American Custom Chemicals Corporation
  • Apolloscientific
  • Arctom
  • Biosynth
  • ChemBridge Corporation
  • Chemenu
  • Crysdot
  • Matrix Scientific
  • SynQuest Laboratories
  • Synthonix
  • Thermo Scientific Chemicals
  • TRC
Package
  • 250mg
  • 0.500g
  • 500mg
  • 1g
  • 1.00g
  • 2g
  • 5g
  • 5.00g
  • 10g
  • 25g
  • 100g
  • Manufactureraablocks
  • Product numberAA007O8D
  • Product description4-Chlorophthalazin-1(2H)-one ≥97%
  • Packaging250mg
  • Price$15
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA007O8D
  • Product description4-Chlorophthalazin-1(2H)-one 95%
  • Packaging1g
  • Price$28
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA007O8D
  • Product description4-Chlorophthalazin-1(2H)-one 95%
  • Packaging5g
  • Price$95
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA007O8D
  • Product description4-Chlorophthalazin-1(2H)-one ≥97%
  • Packaging25g
  • Price$440
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA007O8D
  • Product description4-Chlorophthalazin-1(2H)-one 95%
  • Packaging100g
  • Price$1430
  • Updated2026-05-28
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberW159594
  • Product description4-Chlorophthalazin-1(2H)-one 97%
  • Packaging5G
  • Price$110
  • Updated2026-05-27
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberW159594
  • Product description4-Chlorophthalazin-1(2H)-one 97%
  • Packaging25G
  • Price$390
  • Updated2026-05-27
  • Buy
  • ManufacturerActivate Scientific
  • Product numberAS163973
  • Product description4-Chloro-1-phthalazinol 95%
  • Packaging5g
  • Price$222
  • Updated2026-06-04
  • Buy
  • ManufacturerActivate Scientific
  • Product numberAS163973
  • Product description4-Chloro-1-phthalazinol 95%
  • Packaging1g
  • Price$62
  • Updated2026-06-04
  • Buy
  • ManufacturerAlichem
  • Product number2257694
  • Product description4-Chlorophthalazin-1(2H)-one
  • Packaging10g
  • Price$400
  • Updated2021-12-16
  • Buy
  • ManufacturerAmerican Custom Chemicals Corporation
  • Product numberHCH0023272
  • Product description4-CHLORO-1,2-DIHYDROPHTHALAZIN-1-ONE 95.00%
  • Packaging1G
  • Price$681.57
  • Updated2021-12-16
  • Buy
  • ManufacturerAmerican Custom Chemicals Corporation
  • Product numberHCH0023272
  • Product description4-CHLORO-1,2-DIHYDROPHTHALAZIN-1-ONE 95.00%
  • Packaging5G
  • Price$1036.91
  • Updated2021-12-16
  • Buy
  • ManufacturerApolloscientific
  • Product numberOR21968
  • Product description4-chloro-1,2-dihydrophthalazin-1-one 96%
  • Packaging5g
  • Price$142
  • Updated2026-06-04
  • Buy
  • ManufacturerApolloscientific
  • Product numberOR21968
  • Product description4-chloro-1,2-dihydrophthalazin-1-one 96%
  • Packaging1g
  • Price$39
  • Updated2026-06-04
  • Buy
  • ManufacturerApolloscientific
  • Product numberOR21968
  • Product description4-chloro-1,2-dihydrophthalazin-1-one 96%
  • Packaging250mg
  • Price$21
  • Updated2026-06-04
  • Buy
  • ManufacturerArctom
  • Product numberBD-A414816
  • Product description4-Chlorophthalazin-1(2H)-one 95%
  • Packaging250mg
  • Price$16
  • Updated2026-05-26
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA007O8D 4-Chlorophthalazin-1(2H)-one ≥97% 250mg $15 2026-05-28 Buy
aablocks AA007O8D 4-Chlorophthalazin-1(2H)-one 95% 1g $28 2026-05-28 Buy
aablocks AA007O8D 4-Chlorophthalazin-1(2H)-one 95% 5g $95 2026-05-28 Buy
aablocks AA007O8D 4-Chlorophthalazin-1(2H)-one ≥97% 25g $440 2026-05-28 Buy
aablocks AA007O8D 4-Chlorophthalazin-1(2H)-one 95% 100g $1430 2026-05-28 Buy
ACHEMBLOCK W159594 4-Chlorophthalazin-1(2H)-one 97% 5G $110 2026-05-27 Buy
ACHEMBLOCK W159594 4-Chlorophthalazin-1(2H)-one 97% 25G $390 2026-05-27 Buy
Activate Scientific AS163973 4-Chloro-1-phthalazinol 95% 5g $222 2026-06-04 Buy
Activate Scientific AS163973 4-Chloro-1-phthalazinol 95% 1g $62 2026-06-04 Buy
Alichem 2257694 4-Chlorophthalazin-1(2H)-one 10g $400 2021-12-16 Buy
American Custom Chemicals Corporation HCH0023272 4-CHLORO-1,2-DIHYDROPHTHALAZIN-1-ONE 95.00% 1G $681.57 2021-12-16 Buy
American Custom Chemicals Corporation HCH0023272 4-CHLORO-1,2-DIHYDROPHTHALAZIN-1-ONE 95.00% 5G $1036.91 2021-12-16 Buy
Apolloscientific OR21968 4-chloro-1,2-dihydrophthalazin-1-one 96% 5g $142 2026-06-04 Buy
Apolloscientific OR21968 4-chloro-1,2-dihydrophthalazin-1-one 96% 1g $39 2026-06-04 Buy
Apolloscientific OR21968 4-chloro-1,2-dihydrophthalazin-1-one 96% 250mg $21 2026-06-04 Buy
Arctom BD-A414816 4-Chlorophthalazin-1(2H)-one 95% 250mg $16 2026-05-26 Buy
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Properties

Melting point :273 °C
Density :1.50±0.1 g/cm3(Predicted)
storage temp. :under inert gas (nitrogen or Argon) at 2-8°C
pka :10.58±0.40(Predicted)
Appearance :White to off-white Solid

Safety Information

Symbol(GHS): Exclamation Mark (GHS07)
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.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.

Description

1-Chlorophthalazin-4-one acts as an organic and pharmaceutical intermediate.

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Suppliers and manufacturers

Alfa Aesar Energy Chemical Shanghai Hanhong Scientific Co.,Ltd. Syntechem Co.,Ltd Thermo Fisher Scientific Shanghai Keepontech Co.,Ltd 9ding chemical ( Shanghai) Limited Bide Pharmatech Ltd. Zhengzhou Guancheng Laboratory equipment Sales Shanghai YuanYe Biotechnology Co., Ltd.