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Phosphonodithioic acid, methyl-, O-ethyl ester, also known as ethyl methyl phosphorodithioate or fenamiphos, is an organophosphorus compound widely used as an agricultural pesticide. It is a colorless to pale yellow liquid with a chemical formula of C5H12O2PS3. Phosphonodithioic acid, methyl-, O-ethyl ester acts as an acetylcholinesterase inhibitor, targeting the nervous system of pests and disrupting their normal functioning, leading to paralysis and death. Fenamiphos is effective against a broad spectrum of pests, including mites, aphids, and whiteflies, and is used in various crops such as fruits, vegetables, and ornamental plants. However, due to its potential health risks and environmental concerns, its use is restricted or banned in some countries.

999-83-7

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Basic information
1. Product Name: Phosphonodithioic acid, methyl-, O-ethyl ester
2. Synonyms:
3. CAS NO:999-83-7
4. Molecular Formula: C3H9OPS2
5. Molecular Weight: 156.21
6. EINECS: N/A
7. Product Categories: N/A
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: N/A
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: Phosphonodithioic acid, methyl-, O-ethyl ester(CAS DataBase Reference)
10. NIST Chemistry Reference: Phosphonodithioic acid, methyl-, O-ethyl ester(999-83-7)
11. EPA Substance Registry System: Phosphonodithioic acid, methyl-, O-ethyl ester(999-83-7)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 999-83-7(Hazardous Substances Data)

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999-83-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 999-83-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 9,9 and 9 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 999-83:
(5*9)+(4*9)+(3*9)+(2*8)+(1*3)=127
127 % 10 = 7
So 999-83-7 is a valid CAS Registry Number.

999-83-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017

1.Identification

1.1 GHS Product identifier

Product name	ethoxy-methyl-sulfanylidene-sulfido-λ<sup>5</sup>-phosphane

1.2 Other means of identification

Product number	-
Other names	methyl-phosphonodithioic acid O-ethyl ester

1.3 Recommended use of the chemical and restrictions on use

Identified uses	For industry use only.
Uses advised against	no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number	-
Service hours	Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

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