Irgarol 1071
N’-tert-butyl-N-cyclopropyl-6-(methylthio)-1,3,5-triazine-2,4-diamine
28159-98-0
Ciba Specialty Chemicals
防腐剂 >> 除海藻剂&杀真菌剂
Preservative >> Algicide & Fungicide
建筑/装饰
Architectural / Decorative
木器 &家具涂层
Wood & Furniture Coatings
IRGAROL 1071 is an algaecide specifically designed for use in
architectural coatings. It is a highly specific and effective inhibitor of
photosynthesis which can control the fouling of surfaces caused by
algae. Its very low water solubility allows the formulation of coatings
with very low leaching rates and therefore very long servicelife.
IRGAROL 1071 is a highly specific and effective inhibitor of
photosynthesis. This makes it ideal, combined with its low water
solubility, for use in exterior architectural coatings to prevent the
growth of algae.
Growth of algae on surfaces can cause several problems including
discoloration (sometimes mistaken as due to fungi) and provide a
basis for fungus, moss, or lichen growth which can lead to decay of
the coating and the substrate.
While IRGAROL 1071 shows outstanding performance in the control
of algae, it has comparatively low biological activity to animals in
general, including humans. It is therefore an ideal active substance for
the formulation of biocide packages with a designed performance
profile, where it is combined with other active ingredients to control
additional target organisms.
IRGAROL 1071 is often combined with a fungicide and may be used
for applications such as house paint, stucco, caulks, sealants, clear
coatings (e.g. for wood), roof tiles and other cementitious materials. It
is advised that water from treated surfaces should not be collected
and used for any agricultural purposes or as drinking water.
Recommended concentrations are highly dependant on several
factors such as climate, leaching rate, and desired life time of the
coating. Levels of 0.1 to 1% based on binder solids have been used.
The amount of IRGAROL 1071 required for optimum performance
should be determined in trials covering a concentration range.
Designed biological activity of IRGAROL 1071
IRGAROL 1071 is exceptionally active towards algae, the target
organism to be controlled, and is less active by a factor of typically
100 or more against animals in general. Therefore at typical use
levels IRGAROL 1071 offers a large margin of safety. This makes
it an environmentally acceptable and safe alternative to many other
biocides.
The concentration at which algae growth is reduced by 50% (EC50)
is around 1µg/liter; the concentration at which no effects are
observed (NOEC) is around 0.1 µg/liter.
Fate of IRGAROL 1071 after release to the environment
The octanol/water coefficient of IRGAROL 1071, log Pow is 2.8,
which is close to the classification requirement of Directive
67/548/EEC and indicates a moderate preference of the
compound to adsorb to organic substances. Laboratory studies
conducted with fish demonstrated the bioconcentration maximum
(BCF) to be between 60x and 240x. The observation that the
bioconcentration of IRGAROL 1071 is reversible through a fast
excretion, however, leads to the conclusion that IRGAROL 1051
does not bioaccumulate in the food chain.
IRGAROL 1071 is classified as “not readily biodegradable”. As part
of its Responsible Care program Ciba Specialty Chemicals
conducted several further degradation studies. Two main
degradation processes for IRGAROL 1071 were identified:
microbial metabolism and photolysis. The speed of the
degradation in the natural environment depends on various factors,
the most important ones being temperature, the microbial activity
of the environment (coating surface or soil) and presence of
daylight.
The results of the extended studies demonstrated that in parallel to
degradation of the active substance, the biological activity to algae
diminishes, irrespective to the temporary appearance of
metabolites. The metabolites are therefore biologically far less
active than IRGAROL 1071 itself. The half-life of the active
substance and each major degradation metabolite was found to
typically vary between 1 and 3 months.
Further ecological and toxicological properties of IRGAROL 1071
have been extensively investigated by Ciba Specialty Chemicals and
also by independent parties. More detailed information can be
provided upon request.
Algaecide specifically designed for use in architectural coatings. Highly specific and effective inhibitor of photosynthesis which can control the fouling of surfaces caused by algae. Its very low water solubility allows the formulation of coatings with very low leaching rates and therefore very long service life.
Low biological activity to animals in general, including fish, shellfish, and humans. Ideal active ubstance for the formulation of biocide packages with a designed erformance profile, where it is combined with other active ingredients to control additional target organisms. Often combined with a fungicide and may be used for applications such as house paint, stucco, caulks, sealants, clear
coatings (e.g. for wood), roof tiles and other cementitious materials. It is advised that water from treated surfaces should not be collected and used for any agricultural purposes or as drinking water.
Recommended usage level: 0.1-1.0% based on binder solids.