1(2H)-Phthalazinone

Name: 1(2H)-Phthalazinone
Brand: Zemixal
SKU: ZX-025008

Reference StandardAvailable on request

Order 1(2H)-Phthalazinone (CAS 119-39-1) online at Zemixal. Lab and bulk packs, batch COA, fast global delivery. Part of our API Impurities range.

Pack sizes

CAS number119-39-1

FormulaC₈H₆N₂O

Molar mass146.15 g/mol

Physical formSolid

HS code38229090

InChIKeyIJAPPYDYQCXOEF-UHFFFAOYSA-N

IUPAC name2H-phthalazin-1-one

About 1(2H)-Phthalazinone

1(2H)-Phthalazinone is supplied by Zemixal as a characterised reference material for Hydralazine analysis. Key data (Reference Standard): CAS 119-39-1, formula C8H6N2O and molar mass 146.15 g/mol. It is handled as a solid.

Use cases we see most often

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

Safe handling

Classified under GHS with signal word Warning and hazard statements H302. Read the SDS before first use.

Available as 10 mg, 25 mg, 50 mg and 100 mg. Larger or split packs can be arranged. You receive a certificate of analysis with characterisation data with each order. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Hydralazine

See every impurity, metabolite and related compound we list for this API.

Hydralazine standards

Typical uses

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

Applications

Pharmaceutical Manufacturing and QC Research Labs and Universities

Specifications and identifiers

Specifications of 1(2H)-Phthalazinone
Product name	1(2H)-Phthalazinone
Catalogue number	ZX-025008
CAS number	119-39-1
IUPAC name	2H-phthalazin-1-one
Molecular formula	C₈H₆N₂O
Molar mass	146.15 g/mol
Exact mass	146.048
Grade	Reference Standard
Physical form	Solid
XLogP3	0.8
H-bond donors / acceptors	1 / 2
Topological polar surface area	41.5 Å²
HS code	38229090
InChIKey	IJAPPYDYQCXOEF-UHFFFAOYSA-N
SMILES	C1=CC=C2C(=C1)C=NNC2=O
PubChem CID	8394
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

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

Irritant or harmful

Signal word Warning

H302Harmful if swallowed

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

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of 1(2H)-Phthalazinone
10 mg	Quoted on request
25 mg	Quoted on request
50 mg	Quoted on request
100 mg	Quoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about 1(2H)-Phthalazinone

Which CAS number identifies 1(2H)-Phthalazinone?

1(2H)-Phthalazinone is registered under CAS 119-39-1. You may also see it listed as 1-Phthalazinone, Hydralazine 1-Phthalazinone, Phthalazin-1(2H)-one. Our catalogue number for this item is ZX-025008.

What are the formula and molar mass of 1(2H)-Phthalazinone?

For 1(2H)-Phthalazinone, its formula is C8H6N2O and its molar mass is 146.15 g/mol. The systematic (IUPAC) name is 2H-phthalazin-1-one. InChIKey IJAPPYDYQCXOEF-UHFFFAOYSA-N lets you match it in any structure database.

How is 1(2H)-Phthalazinone used in pharmaceutical QC?

1(2H)-Phthalazinone is a characterised reference material linked to Hydralazine. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.

What grade and pack sizes are available for 1(2H)-Phthalazinone?

This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.

Which documents come with 1(2H)-Phthalazinone?

Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.

Can Zemixal ship 1(2H)-Phthalazinone to my country?

Yes. Because 1(2H)-Phthalazinone is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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