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1-Chlorophthalazin-4-one, 98%
1-Chlorophthalazin-4-one, 98%
1-Chlorophthalazin-4-one, 98%
Thermo Scientific Chemicals

1-Chlorophthalazin-4-one, 98%

CAS: 2257-69-4 | C8H5ClN2O | 180.59 g/mol
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Catalog number H27515.06
also known as H27515-06
Price (USD)
244.65
Special offer
Online exclusive
Ends: 30-Jun-2026
288.00
Save 43.35 (15%)
Each
Quantity:
5 g
Request bulk or custom format
Price (USD)
244.65
Special offer
Online exclusive
Ends: 30-Jun-2026
288.00
Save 43.35 (15%)
Each
Chemical Identifiers
CAS2257-69-4
SpecificationsSpecification SheetSpecification Sheet
FormPowder
Assay (HPLC)≥97.5%
Melting Point (clear melt)272.5-278.5?C
Appearance (Color)White to pale cream
1-Chlorophthalazin-4-one acts as an organic and pharmaceutical intermediate.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

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

Notes
Incompatible with oxidizing agents and bases.
RUO – Research Use Only

General References:

  1. Procopiou, P. A.; Browning, C.; Buckley, J. M.; Clark, K. L.; Fechner, L.; Gore, P. M.; Hancock, A. P.; Hodgson, S. T.; Holmes, D. S.; Kranz, M.; Looker, B. E.; Morriss, K. M. L.; Parton, D. L.; Russell, L. J.; Slack, R. J.; Sollis, S. L.; Vile, S.; Watts, C. J. The Discovery of Phthalazinone-Based Human H1 and H3 Single-Ligand Antagonists Suitable for Intranasal Administration for the Treatment of Allergic Rhinitis. J. Med. Chem. 2011, 54 (7), 2183-2195.
  2. Larsson, E. A.; Jansson, A.; Ng, F. M.; Then, S. W.; Panicker, R.; Liu, B.; Sangthongpitag, K.; Pendharkar, V.; Tai, S. J.; Hill, J.; Dan, C.; Ho, S. Y.; Cheong, W. W.; Poulsen, A.; Blanchard, S.; Lin, G. R.; Alam, J.; Keller, T. H.; Nordlund, P. Fragment-Based Ligand Design of Novel Potent Inhibitors of Tankyrases. J. Med. Chem. 2013, 56 (11), 4497-4508.