Picrolonic acid, 98%+

About Picrolonic acid, 98%+

Picrolonic acid is a five-membered N-heterocycle in Synthesis grade carrying the CAS registry number 550-74-3, specified at ≥98% purity. Its molecular formula is C10H8N4O5 and its molecular weight is 264.19 g/mol. Systematically, it is named 5-methyl-4-nitro-2-(4-nitrophenyl)-4H-pyrazol-3-one. Alternative names: Picrolic acid.

The material typically appears as a light yellow to brown powder. Reported physical data include a melting point of 117 °C. Store sealed in a dry, well-ventilated location away from incompatible materials. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span organic synthesis and API synthesis. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 100 mg, 500 mg and 1 g, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Picrolonic acid, 98%+
Catalogue No.	VQ-012636
CAS Number	550-74-3
IUPAC name	5-methyl-4-nitro-2-(4-nitrophenyl)-4H-pyrazol-3-one
Molecular formula	C₁₀H₈N₄O₅
Molecular weight	264.19 g/mol
Exact mass	264.0495
Grade	Synthesis
Purity / assay	≥98%
HSN code	29331990
InChIKey	OVFUUSPKWADLNJ-UHFFFAOYSA-N
SMILES	CC1=NN(C(=O)C1[N+](=O)[O-])C2=CC=C(C=C2)[N+](=O)[O-]
PubChem CID	68369

Physical properties
Physical form	Powder
Appearance	Light yellow to brown powder
Melting point	117 °C
LogP (XLogP3)	1.2
H-bond donors / acceptors	0 / 6
TPSA	124 Å²
Synonyms	2,4-Dihydro-5-methyl-4-nitro-2-(4-nitrophenyl)-3H-pyrazol-3-one, 3-Methyl-4-nitro-1-(4-nitrophenyl)-2-pyrazolin-5-one, 3-Methyl-4-nitro-1-(p-nitrophenyl)-5-pyrazolone, Picrolic acid, 3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-4-nitro-2-(4-nitrophenyl)-, 3-Methyl-4-nitro-1-(4-nitrophenyl)-5-pyrazolone, 3-Methyl-4-nitro-1-(4-nitrophenyl)-1H-pyrazol-5(4H)-one, 3-Methyl-4-nitro-1-(p-nitrophenyl)-2-pyrazolin-5-one, 3-methyl-4-nitro-1-(4-nitrophenyl)-4,5-dihydro-1H-pyrazol-5-one, 2-Pyrazolin-5-one, 3-methyl-4-nitro-1-(p-nitrophenyl)-, 3H-Pyrazol-3-one, 1,4-dihydro-5-methyl-4-nitro-2-(4-nitrophenyl)-, 5-Methyl-4-nitro-2-(4-nitrophenyl)-2,4-dihydro-3H-pyrazol-3-one

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, 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 Picrolonic acid, 98%+?

The CAS Registry Number of Picrolonic acid, 98%+ is 550-74-3. It is also known as 2,4-Dihydro-5-methyl-4-nitro-2-(4-nitrophenyl)-3H-pyrazol-3-one, 3-Methyl-4-nitro-1-(4-nitrophenyl)-2-pyrazolin-5-one, 3-Methyl-4-nitro-1-(p-nitrophenyl)-5-pyrazolone.

What is the molecular formula and molecular weight of Picrolonic acid, 98%+?

Picrolonic acid, 98%+ has the molecular formula C10H8N4O5 and a molecular weight of 264.19 g/mol. Its IUPAC name is 5-methyl-4-nitro-2-(4-nitrophenyl)-4H-pyrazol-3-one.

Which grade and pack sizes of Picrolonic acid, 98%+ can I order?

We supply Picrolonic acid, 98%+ in Synthesis (≥98%) grade, in 10 mg, 100 mg, 500 mg, 1 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Picrolonic acid, 98%+?

Yes. Every lot of Picrolonic acid, 98%+ 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 Picrolonic acid, 98%+ be shipped internationally?

Yes. Picrolonic acid, 98%+ 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.