1(2H)-Phthalazinone

Name: 1(2H)-Phthalazinone
Brand: Vaqora Chemicals
SKU: VQ-026059

About 1(2H)-Phthalazinone

Vaqora Chemicals supplies 1(2H)-Phthalazinone, an impurity of Hydralazine registered under CAS number 119-39-1. Its molecular formula is C8H6N2O and its molecular weight is 146.15 g/mol. Systematically, it is named 2H-phthalazin-1-one. Common synonyms include 1-Phthalazinone and Hydralazine 1-Phthalazinone.

The product is provided as a solid. Store the standard in its sealed vial, protected from light and moisture, and follow the storage condition printed on the COA. It carries the GHS signal word “Warning” with 1 hazard statement. Review the Safety Data Sheet before use.

As a characterised impurity of Hydralazine, it is used for analytical method development, method validation (AMV) and routine quality-control testing, and it supports ANDA and DMF regulatory filings. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Industries

Related to Hydralazine

View every impurity, metabolite and intermediate we list for Hydralazine.

Hydralazine impurities

Specifications & identifiers

Chemical identifiers
Product name	1(2H)-Phthalazinone
Catalogue No.	VQ-026059
CAS Number	119-39-1
IUPAC name	2H-phthalazin-1-one
Molecular formula	C₈H₆N₂O
Molecular weight	146.15 g/mol
Exact mass	146.048
Grade	Reference Standard
HSN code	38229090
InChIKey	IJAPPYDYQCXOEF-UHFFFAOYSA-N
SMILES	C1=CC=C2C(=C1)C=NNC2=O
PubChem CID	8394

Physical properties
Physical form	Solid
LogP (XLogP3)	0.8
H-bond donors / acceptors	1 / 2
TPSA	41.5 Å²
Synonyms	1-Phthalazinone, Hydralazine 1-Phthalazinone, Phthalazin-1(2H)-one, Phthalazone, Phthalazin-1-one, 1-Phthalazinol, Phthalazinone, phthalazin-1-ol, 1-Hydroxyphthalazine, 1,2-dihydrophthalazin-1-one, 1-oxophthalazine

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed

Precautionary statements: P264, P270, P301 + P317, P330, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of 1(2H)-Phthalazinone?

The CAS Registry Number of 1(2H)-Phthalazinone is 119-39-1. It is also known as 1-Phthalazinone, Hydralazine 1-Phthalazinone, Phthalazin-1(2H)-one.

What is the molecular formula and molecular weight of 1(2H)-Phthalazinone?

1(2H)-Phthalazinone has the molecular formula C8H6N2O and a molecular weight of 146.15 g/mol. Its IUPAC name is 2H-phthalazin-1-one.

What is 1(2H)-Phthalazinone used for?

1(2H)-Phthalazinone is supplied as a characterised reference material related to Hydralazine. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of 1(2H)-Phthalazinone can I order?

We supply 1(2H)-Phthalazinone in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 1(2H)-Phthalazinone?

Yes. Every lot of 1(2H)-Phthalazinone is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can 1(2H)-Phthalazinone be shipped internationally?

Yes. 1(2H)-Phthalazinone is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.