Product Safety
Synthetic amorphous precipitated silicas and their surface-treated variants do not contain crystalline components. Definition methods include electron diffraction combined with electron scanning microscopy, and x-ray diffraction. The detection limit for these methods is 0.01 percentage weight. Also, electron-scanning microscopy used in conjunction with electron diffraction makes it possible to identify solid structures up to a size of 10 nanometers. Based on latest findings, ACEMATT® can be classified as completely amorphous.
Toxicology
Findings collected over the past decades in the context of manufacturing and processing of ACEMATT® have shown no toxic effects on humans when used as directed.
Acute toxicity, rat, oral: LD 50 is more than 10.000 mg/kg
ACEMATT® is not irritant to skin and eyes.
Synthetic amorphous silica is an inorganic poorly water-soluble substance. For this reason its bioavailability is very low for aquatic organisms.
In acute tests according to OECD guidelines with Daphnia magna and Brachydanio rerio nominal concentrations of 1.000 or 10.000 mg/l showed no toxicity. Based on the physical-chemical and acute toxicological data no chronic effects and no bioaccumulation in aquatic organisms are expected.
The German commisson of the evaluation of water polluting substances has classified synthetic amorphous silica as not water endangering substance. (KBwS-No. 849)
Information on Handling
Air exhaustion is recommended for facilities that process ACEMATT® in powder form. If the MAK value of 4 mg /m3 (inhalable fraction) is exceeded, a dust mask (P2 Particle Filter Class) must be worn. Electrostatic charges may form when handling ACEMATT®, so that the facilities used must be adequately grounded. To avoid the feeling of dryness that results from contact with bare skin, ACEMATT® should be washed off using water and exposed skin should be treated with moisturizing cream. Spilled product should be collected in adequately sealable containers. ACEMATT® can be disposed of as per recommendations in the European Waste Type Catalog.
Legal Classification
Based on currently applicable standards of Chemical Substance Legislation, the Hazardous Substance Advisory and Transportation Regulations, ACEMATT® products are not classified as dangerous substances or goods.
You can obtain further information on product safety or our Safety Data Sheets from the relevant contact:
AS-FA-PS
Rudolf Weinand
Phone: +49-61 81-59-47 87
E-Mail: rudolf.weinand@degussa.com