DIAZINON

Description

DIAZINON · CAS 333-41-5 · C12H21N2O3PS. UNII YUS1M1Q929. Boiling Point: BP: 125 °C at 1 mm Hg; Melting Point: < 25 °C; Flash Point: 104.4 °C c.c..

Identification

CAS Registry Number	333-41-5
PubChem CID	3017
Molecular formula	C12H21N2O3PS
IUPAC name	diethoxy-(6-methyl-2-propan-2-ylpyrimidin-4-yl)oxy-sulfanylidene-λ5-phosphane
UNII (FDA)	YUS1M1Q929

Computed Descriptors

Molecular Weight	304.35
XLogP3	3.8
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	7
Exact Mass	304.10105071
Monoisotopic Mass	304.10105071
Topological Polar Surface Area	85.6
Heavy Atom Count	19
Formal Charge	0

Physical & Chemical Properties

Boiling Point	BP: 125 °C at 1 mm Hg
Melting Point	< 25 °C
Flash Point	104.4 °C c.c.
Flash Point	180 °F
Solubility	In water, 40 mg/L at 25 °C
Solubility	0.04 mg/mL at 25 °C
Solubility	0.004%
Density	1.12
Vapor Pressure	0.0001 mmHg (NIOSH, 2024)
Vapor Pressure	0.0001 [mmHg]

Physical description & handling notes

• Liquid; light to dark brown. Sinks in water. Commercial solutions can contain ethanol/xylene/acetone with a flash point in the range 82-105 °F.
• Colorless liquid with a faint ester-like odor. [insecticide]; [NIOSH]
• Solid
• OILY COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. TECHNICAL-GRADE PRODUCT: PALE YELLOW-TO-DARK BROWN.
• Colorless liquid with a faint ester-like odor.
• Colorless liquid with a faint ester-like odor. [insecticide] [Note: Technical grade is pale to dark brown.]

GHS Hazard Classification

Reported hazard statements	H302, H400, H410, H312 (24.4%), H341 (16.1%), H350 (16.6%), H370 (16.6%), H373 (16.6%)

Documented Uses

• Exterminators use a 85-90% concentration, while the liquid or granules used for house and garden contains 1-5% diazinon. [ATSDR ToxFAQs]
• Use on sod farms and golf courses cancelled by EPA in 1988; [EXTOXNET]
• Commercial agriculture products (excluding cattle ear tags) are restricted use due to avian and aquatic toxicity.
• Diazinon is registered to control foliage and soil insects and pests of many fruit, nut, vegetable, and ornamental crops. Diazinon also is used in cattle eartags. All residential uses have been cancelled.
• Insecticide, nematicide, seed treatment/protectant
• Diazinon is used as an insecticide in agriculture, mainly on fruit and vegetable field crops. (L162)

Synonyms

diazinon; Dimpylate; 333-41-5; Oleodiazinon; Neocidol; Ciazinon; Diazinone; Diazitol; Spectracide; Basudin; Nucidol; Sarolex; Antigal; Bazuden; Dacutox; Dassitox

Frequently Asked Questions

What are the CAS number and molecular formula of DIAZINON?

CAS 333-41-5; molecular formula C12H21N2O3PS; molecular weight — g/mol.

What other names is DIAZINON known by?

diazinon, Dimpylate, 333-41-5, Oleodiazinon, Neocidol, Ciazinon.

Is DIAZINON classified as hazardous?

Hazard statements reported: H302, H400, H410, H312, H341.

What are the key physical properties of DIAZINON?

Boiling Point: BP: 125 °C at 1 mm Hg; Melting Point: < 25 °C; Flash Point: 104.4 °C c.c.; Flash Point: 180 °F.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.