Pirimiphos-ethyl

Description

Pirimiphos-ethyl · CAS 23505-41-1 · C13H24N3O3PS. UNII 3L26N84757. Melting Point: 15-18 °C /technical grade/; Solubility: In water, 2.3 mg/L at 25 °C; Density: 1.14 at 20 °C.

Identification

CAS Registry Number	23505-41-1
PubChem CID	31957
Molecular formula	C13H24N3O3PS
IUPAC name	4-diethoxyphosphinothioyloxy-N,N-diethyl-6-methylpyrimidin-2-amine
UNII (FDA)	3L26N84757

Computed Descriptors

Molecular Weight	333.39
XLogP3	4.8
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	7
Rotatable Bond Count	9
Exact Mass	333.12759981
Monoisotopic Mass	333.12759981
Topological Polar Surface Area	88.8
Heavy Atom Count	21
Formal Charge	0

Physical & Chemical Properties

Melting Point	15-18 °C /technical grade/
Solubility	In water, 2.3 mg/L at 25 °C
Density	1.14 at 20 °C
Density	1.14 @ 20°C
Vapor Pressure	0.00029 mmHg at 77 °F (EPA, 1998)
Vapor Pressure	0.00029 [mmHg]
Vapor Pressure	2.9X10-4 mm Hg at 25 °C
Vapor Pressure	0.00029 [mm Hg] @25 °C
LogP	4.85
Ionization Efficiency	4.79

Physical description & handling notes

• Straw colored liquid. Used as a pesticide. (EPA, 1998)
• Straw colored liquid; [Merck Index] Technical product is clear red-brown liquid; mp 15-18 deg C; [HSDB] Yellow liquid; mp = 10-15 deg C; [MSDSonline]
• Straw-colored liquid
• Technical grade is a clear red-brown liquid
• Technical grade has a mercaptan-like odor
• 113 °F, 45 °C (Pensky-Martin closed cup)

GHS Hazard Classification

Reported hazard statements	H301, H312, H400, H410, H227, H311

Documented Uses

• Used as broad spectrum contact and fumigant insecticide and veterinary ectoparasiticide; [Merck Index] Used for fruits, ornamentals, turf, vegetables, and other crops; Also used in combination with fungicides for seed treatment; [HSDB]
• Broad-spectrum control of Diptera and Coleoptera soil pests and some foliar pests on bananas and other fruit, field crops, ornamentals, turf, vegetables, etc.
• ... Used as a seed treatment, and in compost to control sciarid and phorid flies on mushrooms.
• Pirimiphos-ethyl may be made from N,N-diethylguanidine, which is condensed with ethyl acetoacetate & then reacted with O,O-diethyl phosphorochloridothioate.
• Many of the organophosphorus insecticides are excreted in the milk ... /Organophosphorus insecticides/
• Following their absorption, most organophosphorus cmpd are excreted ... as hydrolysis products in the urine. /Organophosphorus anticholinesterase agents/

Synonyms

Pirimiphos-ethyl; 23505-41-1; Pirimiphos ethyl; Primicid; Pirimifosethyl; Primotec; Solgard; DTXSID5042297; R 42211; Pyrimiphos-ethyl (ISO-French); PP211; EPA Pesticide Chemical Code 108101; AI3-27698; 3L26N84757; DTXCID3022297; 2-Diethylamino-6-methyl-4-pyrimidinyl diethyl phosphorothioate

Frequently Asked Questions

What are the CAS number and molecular formula of Pirimiphos-ethyl?

CAS 23505-41-1; molecular formula C13H24N3O3PS; molecular weight — g/mol.

What other names is Pirimiphos-ethyl known by?

Pirimiphos-ethyl, 23505-41-1, Pirimiphos ethyl, Primicid, Pirimifosethyl, Primotec.

Is Pirimiphos-ethyl classified as hazardous?

Hazard statements reported: H301, H312, H400, H410, H227.

What are the key physical properties of Pirimiphos-ethyl?

Melting Point: 15-18 °C /technical grade/; Solubility: In water, 2.3 mg/L at 25 °C; Density: 1.14 at 20 °C; Density: 1.14 @ 20°C.

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.