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Basic Information
CAS No.: 9002-91-9
Name: Metaldehyde
Molecular Structure:
Molecular Structure of 9002-91-9 (Metaldehyde)
Formula: (C2H4O)n
Molecular Weight: 44.0532
Synonyms: Antimilace;2,4,6,8-Tetramethyl-1,3,5,7-tetraoxacyclooctane or acetaldehyde homopolymer;Namekil;Acetaldehyde, polymers;Acetaldehyde, homopolymer;Limovet;Schnex-schneckentod;Polyacetaldehyde;Limax;Meta;Slugit;Terrasan-schneckentod gekoernt;Schneckokorn;
EINECS: 200-836-8
Density: 0,808 g/cm3
Melting Point: 165 °C
Boiling Point: 18.6oC at 760mmHg
Flash Point: 50 °C
Solubility: 0.2g/L(17 oC)
Appearance: White needle-shaped crystalline
Hazard Symbols: R10:; R22:;
Risk Codes:  Xn:Harmful;
">  Xn:Harmful;
Safety: 13-23-46-45
PSA: 0.00000
LogP: 0.00000
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Chemistry

Molecular Structure of Polyacetaldehyde (CAS No.9002-91-9):

Molecular Formula: (C2H4O)n
CAS No: 9002-91-9
Melting Point: 190-196 ºC
Density 0,808 g/cm3
Flash Point: 50 °C
Storage Temp.: 0-6°C
Form: Powder
Product Categories: Polymers;Insecticide
Classification Code: Molluscacides;Pesticides;TSCA Flag XU [Exempt from reporting under the Inventory Update Rule]

Uses

Polyacetaldehyde(9002-91-9) is a highly effective active ingredient to control slugs and snails (molluscicide).

Production

  Polyacetaldehyde(9002-91-9) is formed by cationic polymerization using boron trifluoride (BF3) in liquid ethylene (CH2=CH2). At temperatures below -75 °C using anionic initiators, such as metal alkyls in a hydrocarbon solvent, a crystalline isotactic polymer is obtained. Molecular weights of the products fall into the range 800,000 to 3,000,000.

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
dog LD50 oral 600mg/kg (600mg/kg)   Pesticide Manual. Vol. 9, Pg. 556, 1991.

Safety Profile

Safety Information of Polyacetaldehyde (CAS No.9002-91-9):
Hazard Codes: HarmfulXn
Risk Statements: 10-22 
R10:Flammable. 
R22:Harmful if swallowed.
Safety Statements: 13-23-46 
S13:Keep away from food, drink and animal foodstuffs. 
S23:Do not breathe vapour. 
S46:If swallowed, seek medical advice immediately and show this container or label.
RIDADR: UN 1332 4.1/PG 3
WGK Germany: 1
RTECS: AB3042000
HazardClass: 4.1
PackingGroup: III
Hazardous Substances Data: 9002-91-9(Hazardous Substances Data)

Specification

   Polyacetaldehyde (CAS No.9002-91-9), it also can be called Acetaldehyde polymerized ; Acetaldehyde homopolymer ; 2,4,6,8-Tetramethyl-1,3,5,7-tetraoxacyclooctane ; Antimilace . It is white crystalline powder.