Difference between revisions of "Neodecanoic acid, ethenyl ester"

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Neodecanoic acid ethenyl ester appears to be a very stable monomer that is not biodegradable, at least not by rats in vitro. It shows an high acute toxicity for fish and zooplankton and a lower one for algae: 0.84 mg/l, 0.3 mg/l and 3.4 mg/l respectively.  Presently no studies have yet been conducted on chronic toxicity or sublethal effects.
 
Neodecanoic acid ethenyl ester appears to be a very stable monomer that is not biodegradable, at least not by rats in vitro. It shows an high acute toxicity for fish and zooplankton and a lower one for algae: 0.84 mg/l, 0.3 mg/l and 3.4 mg/l respectively.  Presently no studies have yet been conducted on chronic toxicity or sublethal effects.
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In rats it has a low toxicity when inhaled, eaten or touched. It can also cause (minimal) irritation to their eyes and skin. 
  
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The substance is considered to be of low risk towards human health, but might cause environmental problems (especially for fish and marine invertebrates) if released into the environment.
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The acute toxicity tests indicate low toxicity by inhalation, dermal, and oral routes of exposure to rodents. With regards to irritation in animals, there is evidence of limited (minimal to non-irritating) potential to eyes and skin.  Repeated dosing of neodecanoic acid ethenyl ester has shown a low degree of toxicity in rats by inhalation (0.25, 0.5 and 1.0 g/m3 for 6hr/day, 5d/wk, 13 weeks) or oral exposure (100, 250, 1000 mg/kg/d, for 28
 
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Neodecanoic acid ethenyl ester has been tested for its acute toxicity to fish, invertebrates and algae.  No chronic studies have been conducted.  Aquatic toxicity testing has been problematic due to its low water solubility and its likely adherence to glassware.  The substance is acutely toxic to aquatic organisms: the lowest GLP results are fish LC50 0.84 mg/L, invertebrates (marine copepod) EC50 0.3 mg/L, and algae EbC50 3.4 mg/L and ErC50 > 4.8 mg/L. As indicated above this chemical exhibited a low biomagnification factor, but according to OECD GHS criteria by its derived BCF would be considered to bioconcentrate (=bioaccumulate) since the derived BCF >500.
 
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Human Health: The chemical is a low priority for further work due to its low hazard profile.
 
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Environment: The chemical is a candidate for further work. The chemical possesses properties indicating a hazard for the environment (acute toxicity to fish and aquatic invertebrates).  Member countries are invited to perform an exposure assessment for the environment and if necessary a risk assessment.
 

Revision as of 14:33, 31 July 2009

Definition of neodecanoic acid, ethenyl ester:
Neodecanoic acid, ethenyl ester is an anthropogenic chemical used exclusively in polymerization to make the resulting products more hydrolytically and UV-stable. The primary uses include polymers used in paints and coatings (65%), and adhesives i.e. re-dispersible powders (35%). [1]
This is the common definition for neodecanoic acid, ethenyl ester, other definitions can be discussed in the article


Notes

Neodecanoic acid, ethenyl ester has a low risk of entering the environment. The production is carried out in a closed circuit with minimal releases to the environment. Only a very small amount (0,006%) of the neodecanoic acid, ethenyl ester used in paints and coatings can expected to be lost into the environment. Its total global production volume ranges from 46,000 to 230,000 tonnes/yr.

Neodecanoic acid ethenyl ester is a light viscous liquid and is moderately volatile (it boils at 212°C). Due to its low water solubility, it is suspected that in the environment it would be mostly associated with sediments. Only small amounts would be found in water and the atmosphere.

It doesn't dissolve much in water and has a high affinity towards organic matter. It therefore has a tendency for bioaccumulation. However there doesn't appear to be a risk for biomagnification. Fish for example are able to eliminate neodecanoic acid ethenyl ester quite efficiently from there tissues (95% in 14 days).

Neodecanoic acid ethenyl ester appears to be a very stable monomer that is not biodegradable, at least not by rats in vitro. It shows an high acute toxicity for fish and zooplankton and a lower one for algae: 0.84 mg/l, 0.3 mg/l and 3.4 mg/l respectively. Presently no studies have yet been conducted on chronic toxicity or sublethal effects. In rats it has a low toxicity when inhaled, eaten or touched. It can also cause (minimal) irritation to their eyes and skin.

The substance is considered to be of low risk towards human health, but might cause environmental problems (especially for fish and marine invertebrates) if released into the environment.
  1. ↑ OECD Initial hazard assessment of Neodecanoic acid, ethenyl ester; CAS 5100-05-23; SIDS Initial Assessment Report For SIAM 24 Paris, France, 17 – 20 April 2007
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