Metaldehyde Chemical Properties

Melting point:

190-196 °C (subl.)(lit.)

Boiling point:

267.82°C (rough estimate)

Density 

0,808 g/cm³

refractive index 

1.4455 (estimate)

Flash point:

50 °C

storage temp. 

0-6°C

solubility 

Chloroform (Slightly, Heated), Methanol (Very Slightly)

form 

powder

Water Solubility 

0.2g/L(17 ºC)

Merck 

14,5923

LogP

1.140 (est)

CAS DataBase Reference

9002-91-9(CAS DataBase Reference)

EPA Substance Registry System

Acetaldehyde, homopolymer (9002-91-9)

Safety Information

Hazard Codes 

Xn,T,F

Risk Statements 

10-22-23-11

Safety Statements 

13-23-46-45

RIDADR 

UN 1332 4.1/PG 3

WGK Germany 

1

RTECS 

AB3042000

HazardClass 

4.1

PackingGroup 

III

HS Code 

29125000

Toxicity

Acute oral LD50 for dogs 0.6–1.0 g/kg (Worthing and Hance, 1991).

MSDS

• Language:English Provider:Acetaldehyde homopolymer
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Metaldehyde Usage And Synthesis

Chemical Properties

White crystalline powder

Uses

META(R) Metaldehyde is a highly effective active ingredient to control slugs and snails (molluscicide) WWW Link

Uses

In compressed form as a fuel instead of alcohol; molluscicide.

Definition

A solid compound,C₄O₄H₄(CH₃)₄, formed by polymerizationof ethanal (acetaldehyde) in diluteacid solutions below 0°C. Thecompound, a tetramer of ethanal, isused in slug pellets and as a fuel forportable stoves.

Definition

A polymer of acetaldehyde in which n usually is 4–6.

Hazard

Flammable, dangerous fire risk. Strong irritant to skin and mucous membranes.

Carcinogenicity

There is no evidence in the literature that metaldehyde has carcinogenic potential.

Environmental Fate

Plant. When applied to citrus rinds, 50% was lost after 4.6 days for the first 33 days and an additional 25% was lost 14 days for the subsequent 26 days (Iwata et al., 1982). Chemical/Physical. Metaldehyde can be converted to acetaldehyde by heating to 150°C for 4–5 hours or by the reaction of concentrated hydrochloric acid (6 M) for a couple of minutes (Booze and Oehme, 1985).

Metaldehyde(9002-91-9)Related Product Information

• Acetaldehyde
• Glyoxylic acid
• Chloral
• TOLFENPYRAD
• ALDEHYDE DEHYDROGENASE
• DIHYDRO-2,4,6-TRIMETHYL-1,3,5(4H)DITHIAZINE
• Tetracetaldehyde W.P.
• PARAFORMALDEHYDE
• Paraldehyde
• Metaldehyde
• Metaldehyde
• HOMOPOLYMER
• Carbaryl+Tetracetaldehyde,granular (6%)
• PolyalLomer(PP&PE)
• CARBARYL METALDEHYDE, GRANULES
• METALDEHYDE SOLUTION 100UG/ML IN TOLUENE 1ML