Phthalazone - ≥98% , CAS No.119-39-1

CAS: 119-39-1 Cat. No.: P138088 Molecular Weight: 146.15 Beilstein Registry Number: 3654 EC Number: 204-319-8 PubChem CID: 8394
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
NCGC00091321-01 | CHEBI:34023 | Benzo[d]pyridazin-1(2H)one | EINECS 204-319-8 | W-60386 | (2H)-phthalazinone | Phthalazone pound>>Phthalazin-1(2H)-one | Phthalazone | IJAPPYDYQCXOEF-UHFFFAOYSA- | EU-0033708 | P1179 | NSC52567 | NSC-52567 | Phthalazinone |
Storage
Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
5g
P138088-5g
5

$9.90

$14.90
Save $5.00 (33.56%)
25g
P138088-25g
7

$11.90

$17.90
Save $6.00 (33.52%)
100g
P138088-100g
3

$46.90

$70.90
Save $24.00 (33.85%)
500g
P138088-500g
1

$172.90

$259.90
Save $87.00 (33.47%)
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Why this grade

≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature Ships Normal Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
NCGC00091321-01 | CHEBI:34023 | Benzo[d]pyridazin-1(2H)one | EINECS 204-319-8 | W-60386 | (2H)-phthalazinone | Phthalazone pound>>Phthalazin-1(2H)-one | Phthalazone | IJAPPYDYQCXOEF-UHFFFAOYSA- | EU-0033708 | P1179 | NSC52567 | NSC-52567 | Phthalazinone |
Specifications & Purity
≥98%
Storage
Room temperature
Shipped In
Normal
Purity
≥98%
Names and Identifiers
Pubchem Sid488180773
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488180773
Canonical SmilesC1=CC=C2C(=C1)C=NNC2=O
IUPAC Name2H-phthalazin-1-one
InChIKeyIJAPPYDYQCXOEF-UHFFFAOYSA-N
INCHI1S/C8H6N2O/c11-8-7-4-2-1-3-6(7)5-9-10-8/h1-5H,(H,10,11)
Isomeric SMILES C1=CC=C2C(=C1)C=NNC2=O
WGK Germany 3
RTECS TH9185000
PubChem CID 8394
Molecular Weight 146.15
Beilstein 3654
Reaxy-Rn 3654

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassDiazanaphthalenes
SubclassBenzodiazines
Intermediate Tree Nodes Phthalazines
Direct ParentPhthalazinones
Alternative Parents Pyridazinones  Benzenoids  Heteroaromatic compounds  Lactams  Azacyclic compounds  Organopnictogen compounds  Organooxygen compounds  Organonitrogen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Phthalazinone - Pyridazinone - Benzenoid - Pyridazine - Heteroaromatic compound - Lactam - Azacycle - Organic nitrogen compound - Organic oxygen compound - Organopnictogen compound - Organic oxide - Hydrocarbon derivative - Organooxygen compound - Organonitrogen compound - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as phthalazinones. These are compounds containing a phthalazine bearing a ketone group.
External Descriptors phthalazines
3D Structure
Interactive Chemical Structure Model





Associated Targets(Human)
PDE4B Tclin cAMP-specific 3',5'-cyclic phosphodiesterase 4B (1 Activities)
Activity TypeActivity Value -log(M)Mechanism of ActionActivity ReferencePublications (PubMed IDs)
DHFR Tclin Dihydrofolate reductase (3072 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
PDE4B Tclin Phosphodiesterase 4B (2748 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
PRKCI Tchem Protein kinase C iota (2821 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
ALDH1A1 Tchem Aldehyde dehydrogenase 1A1 (77053 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
PARP1 Tclin Poly [ADP-ribose] polymerase-1 (6206 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
HSD17B10 Tchem Endoplasmic reticulum-associated amyloid beta-peptide-binding protein (20669 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
TDP1 Tchem Tyrosyl-DNA phosphodiesterase 1 (345557 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Mechanisms of Action
Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

13 results found

Lot NumberCertificate TypeDateItem
E2422326Certificate of AnalysisMar 11, 2026 P138088
I2311610Certificate of AnalysisJun 10, 2025 P138088
I2311661Certificate of AnalysisJun 10, 2025 P138088
F2310510Certificate of AnalysisMar 04, 2025 P138088
F2310513Certificate of AnalysisMar 04, 2025 P138088
F2310515Certificate of AnalysisMar 04, 2025 P138088
F2310517Certificate of AnalysisMar 04, 2025 P138088
F2310518Certificate of AnalysisMar 04, 2025 P138088
F2310524Certificate of AnalysisMar 04, 2025 P138088
A2303354Certificate of AnalysisJan 07, 2023 P138088
E1719065Certificate of AnalysisNov 11, 2022 P138088
D2325232Certificate of AnalysisNov 11, 2022 P138088
E23161132Certificate of AnalysisNov 11, 2022 P138088

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Chemical and Physical Properties
SolubilitySolubility in hot Methanol almost transparency
Boil Point(°C)337°C
Melt Point(°C)183-185°C
Molecular Weight146.150 g/mol
XLogP30.800
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count2
Rotatable Bond Count0
Exact Mass146.048 Da
Monoisotopic Mass146.048 Da
Topological Polar Surface Area41.500 Ų
Heavy Atom Count11
Formal Charge0
Complexity200.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Documents & Articles
Solution Calculators
Reviews

Customer Reviews

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