Monday, November 5, 2012

Hazard Communication Standard: Safety Data Sheets - Sections 9-11

Section 9: Physical and Chemical Properties
This section identifies physical and chemical properties associated with the substance or mixture.
The minimum required information consists of:
• Appearance (physical state, color, etc.); • Upper/lower flammability or explosive limits;
• Odor; • Vapor pressure;
• Odor threshold; • Vapor density;
• pH; • Relative density;
• Melting point/freezing point; • Solubility(ies);
• Initial boiling point and boiling range; • Partition coefficient: n-octanol/water;
• Flash point; • Auto-ignition temperature;
• Evaporation rate; • Decomposition temperature; and
• Flammability (solid, gas); • Viscosity.
The SDS may not contain every item on the above list because information may not be relevant
or is not available. When this occurs, a notation to that effect must be made for that chemical
property. Manufacturers may also add other relevant properties, such as the dust deflagration
index (Kst) for combustible dust, used to evaluate a dust's explosive potential.
Section 10: Stability and Reactivity
This section describes the reactivity hazards of the chemical and the chemical stability
information. This section is broken into three parts: reactivity, chemical stability, and other.
The required information consists of:
• Description of the specific test data for the chemical(s). This data can be for a class or family
of the chemical if such data adequately represent the anticipated hazard of the chemical(s),
where available.
Chemical stability
• Indication of whether the chemical is stable or unstable under normal ambient temperature
and conditions while in storage and being handled.
• Description of any stabilizers that may be needed to maintain chemical stability.
• Indication of any safety issues that may arise should the product change in physical
• Indication of the possibility of hazardous reactions, including a statement whether the chemical
will react or polymerize, which could release excess pressure or heat, or create other hazardous
conditions. Also, a description of the conditions under which hazardous reactions may occur.
• List of all conditions that should be avoided (e.g., static discharge, shock, vibrations, or
environmental conditions that may lead to hazardous conditions).
• List of all classes of incompatible materials (e.g., classes of chemicals or specific substances)
with which the chemical could react to produce a hazardous situation.
• List of any known or anticipated hazardous decomposition products that could be produced
because of use, storage, or heating. (Hazardous combustion products should also be included
in Section 5 (Fire-Fighting Measures) of the SDS.)
Section 11: Toxicological Information
This section identifies toxicological and health effects information or indicates that such data
are not available. The required information consists of:
• Information on the likely routes of exposure (inhalation, ingestion, skin and eye contact).
The SDS should indicate if the information is unknown.
• Description of the delayed, immediate, or chronic effects from short- and long-term exposure.
• The numerical measures of toxicity (e.g., acute toxicity estimates such as the LD50 (median
lethal dose)) - the estimated amount [of a substance] expected to kill 50% of test animals in a
single dose.
• Description of the symptoms. This description includes the symptoms associated with
exposure to the chemical including symptoms from the lowest to the most severe exposure.
• Indication of whether the chemical is listed in the National Toxicology Program (NTP)
Report on Carcinogens (latest edition) or has been found to be a potential carcinogen in the
International Agency for Research on Cancer (IARC) Monographs (latest editions) or found
to be a potential carcinogen by OSHA.

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