This entry provides a brief description of the
appearance and odor of each substance. Notations are made as to whether a
substance can be shipped as a liquefied compressed gas or whether it has
major use as a pesticide.
Chemical and Physical Properties
The following abbreviations are used for the
chemical and physical properties given for each substance. "NA"
indicates that a property is not applicable, and a question mark (?)
indicates that it is unknown.
| MW |
Molecular weight |
| BP |
Boiling point at 1 atmosphere, °F |
| Sol |
Solubility in water at 68 °F (unless a
different temperature is noted), % by weight (i.e., g/100 ml) |
| Fl.P |
Flash point (i.e., the temperature at
which the liquid phase gives off enough vapor to flash when
exposed to an external ignition source), closed cup (unless
annotated "(oc)" for open cup), °F |
| IP |
Ionization potential, eV (electron volts)
[Ionization potentials are given as a guideline for the selection
of photoionization detector lamps used in some direct-reading
instruments.] |
| VP |
Vapor pressure at 68 °F (unless a
different temperature is noted), mm Hg; "approx"
indicates approximately |
| MLT |
Melting point for solids, °F |
| FRZ |
Freezing point for liquids and gases, °F |
| UEL |
Upper explosive (flammable) limit in air,
% by volume (at room temperature unless otherwise noted) |
| LEL |
Lower explosive (flammable) limit in air,
% by volume (at room temperature unless otherwise noted) |
| MEC |
Minimum explosive concentration, g/m3
(when available) |
| Sp.Gr |
Specific gravity at 68 °F (unless a
different temperature is noted) referenced to water at 39.2 °F (4
°C) |
| RGasD |
Relative density of gases referenced to
air = 1 (indicates how many times a gas is heavier than air at the
same temperature) |
When possible, the flammability/combustibility of
a substance was determined and listed after the specific gravity. The
following OSHA criteria (29 CFR 1910.106) were used to classify flammable
or combustible liquids:
| Class IA flammable liquid |
Fl.P. below 73 °F and BP below 100 °F. |
| Class IB flammable liquid |
Fl.P. below 73 °F and BP at or above 100
°F. |
| Class IC flammable liquid |
Fl.P. at or above 73 °F and below 100 °F. |
| Class II combustible liquid |
Fl.P. at or above 100 °F and below 140 °F. |
| Class IIIA combustible liquid |
Fl.P. at or above 140 °F and below 200 °F. |
| Class IIIB combustible liquid |
Fl.P. at or above 200 °F. |
Incompatibilities and Reactivities
This entry lists important hazardous
incompatibilities or reactivities of each substance.
Measurement Methods
This entry provides a source (NIOSH or OSHA) and
the method number for which a measurement method can be used to determine
the exposure. Unless otherwise noted, the NIOSH methods are from the 4th
edition of the NIOSH
Manual of Analytical Methods (DHHS [NIOSH] Publication No.
94-113). If a different edition of the NIOSH Manual of Analytical
Methods is cited, the appropriate edition and, where applicable, the
volume number would be noted [e.g., II-4 (2nd edition, volume 4)]. The
OSHA methods are from the OSHA web site, http://www.osha-slc.gov/dts/sltc/methods/.
"None available" means that no method is available from the
NIOSH or OSHA source.
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