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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Phthalazine, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Phthalazine impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Phthalazine-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Phthalazine Related Compounds

Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"1,4-Dichloro-6,7-dimethoxyphthalazine" Impurities CS-T-52616 99161-51-0 Enquire
"5-Amino-2,3-dimethyl-2,3-dihydrophthalazine-1,4-dione" Impurities CS-M-49452 873967-42-1 Enquire
(E)-4-(phthalazin-1-yldiazenyl)-1,1'-biphthalazine Impurities CS-O-47133 Not Available Enquire
1-Chloro-4-methyl-phthalazine Impurities CS-M-08800 19064-68-7 Enquire
2H-[1,2,3]triazolo[4,5-f]phthalazine Impurities CS-O-47406 Not Available Enquire
3-Methyl-1,2,4-triazolo[3,4-a]phthalazine Impurities CS-T-35232 20062-41-3 In Stock
5-Bromo-phthalazine Impurities CS-DV-03073 103119-78-4 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"1,2,3,4-Tetrahydrophthalazine Dihydrochloride" Intermediates CS-DJ-00769 86437-12-9 Enquire
"1,4-bis(9-O-dihydroquinidinyl)phthalazine" Intermediates CS-DV-00756 140853-10-7 Enquire
"1,4-Dioxo-1,2,3,4-tetrahydrophthalazine-6-carboxylic acid" Intermediates CS-AC-08265 42972-13-4 Enquire
"1-benzyl-4-(2,4-dichlorophenoxy)phthalazine" Intermediates CS-EL-32110 339026-58-3 Enquire
"3-(3-chloro-2-methylphenyl)-N'-(4-methylbenzoyl)-4-oxo-3,4-... Intermediates CS-EL-20021 866039-05-6 Enquire
"3-(4-chlorophenyl)-4-oxo-3,4-dihydro-1-phthalazinecarboxami... Intermediates CS-EL-02376 97458-93-0 Enquire
"3-(4-chlorophenyl)-4-oxo-3,4-dihydro-1-phthalazinecarboxyli... Intermediates CS-EL-03774 86662-15-9 Enquire
"3-(4-fluorophenyl)-4-oxo-3,4-dihydro-1-phthalazinecarboxami... Intermediates CS-EL-10606 241127-32-2 Enquire
"3-(D-Glucopentitol-1-yl)-1,2,4-triazolo[3,4-a]phthalazine" Intermediates CS-T-55296 79364-50-4 Enquire
"4-Oxo-3,4-dihydro-phthalazine-1-carboxylic acid" Intermediates CS-M-05596 3260-44-4 Enquire
"4-Oxo-3-[3-(trifluoromethyl)phenyl]-3,4-dihydro-1-phthalazi... Intermediates CS-M-32776 339021-26-0 Enquire
"4-Oxo-3-phenyl-3,4-dihydrophthalazine-1-carboxylic acid" Intermediates CS-AC-12529 57531-19-8 Enquire
"6,7-Dimethoxy-1,4-phthalazinediol" Intermediates CS-T-19723 10001-35-1 Enquire
"6-Chloro-[1,2,4]triazolo[3,4-a]phthalazine" Intermediates CS-M-04329 52494-53-8 Enquire
1-(Azetidin-3-yloxy)phthalazine hydrochloride Intermediates CS-ED-35781 2098099-67-1 Enquire
1,1,-Di(phthalazine-yl)amine Intermediates CS-T-20967 103429-70-5 Enquire
1,4-Dichloro-6,7-difluorophthalazine Intermediates CS-ED-25323 945599-38-2 Enquire
1,4-Dichlorophthalazine Intermediates CS-M-50478 Not Available Enquire
1-amino-6-bromophthalazine Intermediates CS-DV-00823 918811-38-8 Enquire
1-Aminophthalazine Intermediates CS-T-03317 19064-69-8 In Stock
1-Chloro-4-(4-pyridinylmethyl)phthalazine Intermediates CS-T-12622 101094-85-3 Enquire
1-Chloro-4-methoxy-phthalazine Intermediates CS-M-05502 19064-71-2 Enquire
1-Chloro-4-phenylphthalazine Intermediates CS-ED-23647 10132-01-1 Enquire
1-Chloro-6,7-dimethoxyphthalazine Intermediates CS-T-50470 70724-23-1 Enquire
1-Methoxyphthalazine Intermediates CS-ED-42143 24953-56-8 Enquire
1-Phenoxyphthalazine Intermediates CS-T-39317 100537-30-2 Enquire
2-(2-Aminoethyl)-2,3-dihydrophthalazine-1,4-dione Intermediates CS-ED-04049 87365-18-2 Enquire
2-Aminophthalazin-1(2H)-one Intermediates CS-EO-03993 2832741-84-9 Enquire
2-Methylphthalazin-1(2H)-one Intermediates CS-EO-03994 6091-81-2 Enquire
3-Bromo-s-triazolo[3,4-a]phthalazine Intermediates CS-T-09010 21537-95-1 Enquire
3-Hydrazino-s-triazolo[3,4-a]phthalazine Intermediates CS-T-55712 21517-17-9 Enquire
3-Hydroxymethyl-s-triazolo[3,4-a]phthalazine Intermediates CS-T-28013 54687-66-0 Enquire
3-Methyl-4-oxo-3,4-dihydrophthalazine-1-carbohydrazide Intermediates CS-ED-20578 99072-87-4 Enquire
3-Methyl-4-oxo-3,4-dihydro-phthalazine-1-carboxylic acid Intermediates CS-M-05472 16015-47-7 Enquire
4-Chloro-1-hydrazinophthalazine Intermediates CS-T-72052 51935-42-3 Enquire
4-Methyl-1-hydrazinophthalazine Intermediates CS-T-33986 29902-28-1 Enquire
5-Amino-2,3-dihydrophthalazine-1,4-dione hydrochloride Intermediates CS-ED-02765 74165-64-3 Enquire
6-Bromo-phthalazine Intermediates CS-AC-03827 19064-74-5 Enquire
6-Chloro-3-methyl-[1,2,4]triazolo[3,4-a]-phthalazine Intermediates CS-M-08872 67458-38-2 Enquire
6-Methyl Phthalazine Intermediates CS-T-58473 78032-05-0 Enquire
7-Bromo-1-chlorophthalazine Intermediates CS-ED-16276 1011291-78-3 Enquire
Hydroxy-4-methylphthalazine Intermediates CS-T-27991 5004-48-8 Enquire
Methyl 3-(4-chlorophenyl)-4-oxo-3,4-dihydro-1-phthalazinecar... Intermediates CS-ED-31243 97458-95-2 Enquire
Tetrazolo[5,1-a]phthalazine Intermediates CS-T-61965 234-82-2 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(2-Phthalazin-1-ylhydrazino)phthalazine Fine Chemicals CS-T-39864 24030-07-7 Enquire
1,4-Dichlorophthalazine Fine Chemicals CS-MM-44466 4752-10-7 In Stock
5-Aminophthalazine Fine Chemicals CS-M-54548 102072-84-4 Enquire
Phthalazine Fine Chemicals CS-T-39863 253-52-1 In Stock