Specification

Durham’s Rock Hard Putty
05/16/2015
Solubility: Insoluble in water
Decomposition Temperature: Not available
Viscosity: Not applicable
Flammability (solid, gas): Not flammable
Flashpoint: Not applicable
Autoignition Temperature: None
Flammable Limits: LEL: Not applicable
UEL: Not applicable
10. STABILITY AND REACTIVITY
Reactivity: Stable.
Chemical Stability: Stable under normal storage and handling conditions.
Possibility of Hazardous Reactions: Hazardous polymerization will not occur. Crystalline silica will dissolve in
hydrofluoric acid and produce silicone tetrafluoride.
Conditions to Avoid: None known.
Incompatible Materials: None known.
Hazardous Decomposition Products:
Oxides of carbon
11. TOXICOLOGICAL INFORMATION
HEALTH HAZARDS:
Eye: Dust may cause mechanical irritation and corneal abrasion.
Skin: May cause mechanical irritation, skin abrasions or dry skin.
Ingestion: No adverse effects expected for normal incidental ingestion. Large amounts may cause
gastrointestinal irritation.
Inhalation:
Inhalation of dust may cause irritation to the nose, throat and upper respiratory tract with
coughing and shortness of breath.
Chronic: This product contains crystalline silica. Repeated inhalation of respirable crystalline silica may cause
may cause a progressive, disabling and sometimes fatal lung disease called silicosis. Symptoms include cough,
shortness of breath, wheezing, non-specific chest illness and reduced pulmonary function.
Sensitization: Not expected to cause sensitization.
Carcinogenicity: Crystalline silica quartz is listed as “Carcinogenic to Humans” (Group 1) by IARC and
“Known to be a Human Carcinogen" by NTP. None of the other components are listed as carcinogens
by OSHA, IARC, NTP, ACGIH or the EU Directive.
Germ Cell Mutagenicity: None of the components of this product are suspected to cause
mutagenicity.
Reproductive Toxicity: No data available.
Numerical Measures of Toxicity:
Plaster of Paris: Oral rat LD50 >2000 mg/kg
Silicon dioxide: Oral rat LD50 > 5000 mg/kg, inhalation rat LC50 > 0.69 mg/L, dermal rabbit LD50 > 2000 mg/kg
Yellow Iron Oxide: Oral rat LD50 > 10000 mg/kg
12. ECOLOGICAL INFORMATION
Ecotoxicity:
Crystalline Silica Quartz: LC50 Carp - >10,000 mg/L/72hr.
This product is not expected to present an environmental hazard.
Page 4 of 6