SDS

MATERIAL SAFETY DATA SHEET
SHEETROCK® Lightweight Setting-Type Joint Compounds
Easy Sand™ 5
MSDS #61-205-003
Page 5 of 9
Odor
Low to no odor
Specific Gravity (H
2
O = 1)
~2.96 (Plaster of Paris),
~2.6 (Limestone), ~2.8
(Mica), <1 (Ex. Perlite)
Odor Threshold
Not Determined
Solubility in water (g/100g)
0.15 - 0.40 (Plaster of
Paris); 0.15 (Limestone);
Insoluble (Mica)
Physical State
Solid/ Powder
Partition Coefficient
Not Determined
pH @ 25 º C
~7
Auto-ignition Temp
Not Determined
Melting Point
Not Applicable
Decomposition Temp
2642ºF/1450ºC
Freezing Point
Not Applicable
Viscosity
Not Applicable
Boiling Point
Not Applicable
Particle Size
Varies
Flash Point
Not Determined
Bulk Density
55-70 lb/ft3 (dry) / 881-
1,121 kg/m3 (dry)
Evaporation Rate (BuAc = 1)
Not Applicable
Molecular Weight
~ 145 g/mole (Plaster of
Paris)
Upper Flammable Limit (UFL)
Not Determined
VOC Content
Zero g/L
Lower Flammable Limit (LFL)
Not Determined
Percent Volatile
Zero
Vapor Pressure (mm Hg)
Not Applicable
SECTION 10
CHEMICAL STABILITY AND REACTIVITY
STABILITY
Stable.
CONDITIONS TO AVOID
Contact with acids, water, high humidity.
INCOMPATIBILITY
Acids. Exposure to water and acids must be supervised because the
reactions are vigorous and produce large amounts of heat.
HAZARDOUS POLYMERIZATION
None known.
HAZARDOUS DECOMPOSITION
Above 1450º C - calcium oxide (CaO) and sulfur dioxide (SO2).
Above 800º C – limestone may decompose to calcium oxide (CaO)
and carbon dioxide (CO2).
SECTION 11
TOXICOLOGICAL INFORMATION
ACUTE EFFECTS: The acute oral toxicity study [OECD TG 420] of calcium sulfate dihydrate showed that this
chemical did not cause any changes even at 2,000 mg/kg b.w. Therefore, the oral LD50 value was more than 2,000-
mg/kg b.w. for female rats. Gypsum paste applied experimentally to the eyes of rabbits was not an irritant. Gypsum
dust particulate has shown an irritant action on mucous membranes of the respiratory tract and eyes. The sulfate ion
has caused gastro-intestinal disturbance in humans following large oral doses. Limited studies involving the repeated
inhalation of an (unspecified) calcium sulfate failed to identify any particular target organs in monkeys, rats and
hamsters. No evidence of mutagenicity was found in Ames bacterial tests.
CHRONIC EFFECTS / CARCINOGENICITY:
Plaster of Paris: Testing of dust from USG plaster of paris has not detected respirable crystalline silica.