ENVIRONMENTAL CONSEQUENCES


Biodegradation

The polymer is sensitive to the action of ultraviolet rays that, by breaking bonds, degrade the polymer into oligomers (molecules of much smaller size). It thus becomes much more sensitive to the aerobic and anaerobic processes of microbiological degradation.

HYDROSOL therefore degrades naturally in soils (up to 10% - 15% per year) in CO2, H2O and nitrogen compounds.


Bioaccumulation

The polymer is much too voluminous to be absorbed into the tissues and cells of plants. Its potential to bioaccumulate is therefore nil (SCPA study n° 97-78).

The period of effectiveness of HYDROSOL in the field ranges from 3 to 7 years depending on particle size and agro-climatic conditions.


Toxicity

HYDROSOL products demonstrate no systemic toxicity (oral LD50/rats > 5000 mg/kg).

HYDROSOL is approved by the French ministry of agriculture (APV N° 9310037).


Series HYDROSOL A French Ministry of Agriculture Approval N° 9310037
Cross linked Copolymer of Acrylamide and Potassium Acrylate
Dry Matter 85% - 90%
Apparent density 0.85
Specific weight 1.10 g/cm3
pH 8.10
Appearance Dry = white powder
Hydrated = transparent gel
Particle size Powders, micro granules, granules
Maximum absorption (in w/w)* 400 in deionized water 150 in soil
Water retention capacity at pF1 980 ml/l
Available water at pF4.2(near-permanent wilting point) 95%
Cationic Exchange Capacity (CEC) 4.6 meq/g
Dosage Substrate: 3 to 5 gram per liter
Broadcast on soil: 50 to 80 g per m2
Effectiveness in soil 3 to 7 years
Toxicity in soil None under normal conditions of use
Packaging 25-kg plastic bag
50-lbs paper bag
Storage temperature 0° - 35°C
Shelf life of the dry product 5 years
* Value that depends on the particle size of the product
In general, all mixture amounts recommended in this document must be adapted to each amount of substrate based on water requirements, plant characteristics, cultivation and weather conditions.




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