Metaldehyde

Bezeichnung:Metaldehyde

Englisch Name:Metaldehyde

CBNumberCB0438854

SummenformelCH2O

Molgewicht30.03

Metaldehyde physikalisch-chemischer Eigenschaften

Schmelzpunkt	190-196 °C (subl.)(lit.)
Siedepunkt	267.82°C (rough estimate)
Dichte	0,808 g/cm³
Brechungsindex	1.4455 (estimate)
Flammpunkt	50 °C
storage temp.	0-6°C
Löslichkeit	Chloroform (Slightly, Heated), Methanol (Very Slightly)
Aggregatzustand	powder
Wasserlöslichkeit	0.2g/L(17 ºC)
Merck	14,5923
LogP	1.140 (est)
CAS Datenbank	9002-91-9(CAS DataBase Reference)
EPA chemische Informationen	Acetaldehyde, homopolymer (9002-91-9)

Sicherheit

Kennzeichnung gefährlicher	Xn,T,F
R-Sätze:	10-22-23-11
S-Sätze:	13-23-46-45
RIDADR	UN 1332 4.1/PG 3
WGK Germany	1
RTECS-Nr.	AB3042000
HazardClass	4.1
PackingGroup	III
HS Code	29125000
Toxizität	Acute oral LD50 for dogs 0.6–1.0 g/kg (Worthing and Hance, 1991).

Gefahreninformationscode (GHS)

R-Sätze Betriebsanweisung:
R10:Entzündlich.
R22:Gesundheitsschädlich beim Verschlucken.
S-Sätze Betriebsanweisung:
S13:Von Nahrungsmitteln, Getränken und Futtermitteln fernhalten.
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S46:Bei Verschlucken sofort ärztlichen Rat einholen und Verpackung oder Etikett vorzeigen.
Chemische Eigenschaften
White crystalline powder
Verwenden
META(R) Metaldehyde is a highly effective active ingredient to control slugs and snails (molluscicide) WWW Link
Verwenden
In compressed form as a fuel instead of alcohol; molluscicide.
Definition
A polymer of acetaldehyde in which n usually is 4–6.
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.
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).