STORAGE, HANDLING AND USE OF
CHEMICALS IN NON-PRODUCTION
LABORATORIES QUESTIONS WITH
VERIFIED ANSWERS
BASEMENT - ANSWERSA story partly below the grade plane and having less than
one-half its
clear height (measured from finished floor to finished ceiling) below the grade plane.
BOILING POINT - ANSWERSThe temperature at which the vapor pressure of a liquid
equals the atmospheric pressure of 14.7 pounds per square inch (psia) or 760 mm of
mercury. Where a boiling point is unavailable for the material in question or for mixtures
which do not have a constant boiling point, for the purposes of this classification, the 20-
percent evaporated point of a distillation performed in accordance with ASTM D 86 shall
be used as the boiling point of the liquid.
CHEMICAL - ANSWERSAn element, chemical compound or mixture of elements or
compounds or both.
CHEMICAL NAME: - ANSWERSThe scientific designation of a chemical in accordance
with the nomenclature system developed by the International Union of Pure and Applied
Chemistry (IUPAC), the Chemical Abstracts Service rules of nomenclature, or a name
that will clearly identify a chemical for the purpose of conducting an evaluation.
CLOSED CONTAINER - ANSWERSA container sealed by means of a lid or other
device capable of preventing the escape of liquid, vapor or dusts in the ordinary course
of storage, handling or use.
COMBUSTIBLE LIQUID - ANSWERSAny liquid that has a closed-cup flash point at or
above 100°F, as determined by the standard test procedures.
CONTAINER - ANSWERSFor solid and liquid hazardous materials, a vessel of 60
gallons or less in capacity used for storage or transportation. For compressed gases, a
container, pressure vessel or tank designed for pressures greater than one atmosphere
at 68°F. Pipes, piping systems, engines and engine fuel tanks associated with solid or
liquid hazardous materials or compressed gases, shall not be deemed to be containers
if in active use.
, CORROSIVE MATERIALS - ANSWERSA liquid, solid, or gas that causes permanent
injury ("full thickness destruction") to human skin at a rate specified by the Department
of Transportation (DOT) regulations. Or a liquid that can corrode 1⁄4 inch of steel or
aluminum within the course of a year.
DESIGN PRESSURE - ANSWERSThe maximum gauge pressure that a pressure
vessel, device, component or system is designed to withstand safely under the
temperature and conditions of use.
DISPENSING - ANSWERSThe pouring or transferring by other means of any material
from a container, tank or similar vessel, which would release dusts, fumes, mists,
vapors or gases to the atmosphere, unless such release is prevented by a device,
equipment or system designed for that purpose.
EXCESS FLOW CONTROL - ANSWERSA fail-safe system or other approved device,
equipment or system designed to shut off flow caused by a rupture in a pressurized
piping system
EXHAUSTED ENCLOSURE - ANSWERSA device, typically consisting of a hood
equipped with a fan that serves to capture and exhaust fumes, mist, vapors and gases
generated at a workstation or other local environment. An exhausted enclosure does
not include a room provided with general ventilation.
EXPLOSION - ANSWERSAn effect produced by the sudden violent expansion of
gases, whether or not accompanied by a shock wave or disruption, of enclosing
materials, including the effects of the following sources of explosion:
1. Chemical changes such as rapid oxidation, deflagration or detonation, decomposition
of molecules and runaway polymerization (usually detonations).
2. Physical changes such as pressure tank ruptures. 3. Atomic changes (nuclear fission
or fusion).
FACE VELOCITY - ANSWERSThe rate of flow or velocity of air moving into the
chemical fume hood entrance or face, as measured at the plane of the chemical fume
hood face.
FIRE SEPARATION - ANSWERSA horizontal or vertical fire resistance-rated assembly
of materials that have protected openings and are designed to restrict the spread of fire.
FLAMMABLE GAS - ANSWERSAny substance that exists in the gaseous state at
normal atmospheric temperature and pressure and is capable of being ignited and
burned when mixed with the proper proportions of air, oxygen, or other oxidizers.
FLAMMABLE LIQUID - ANSWERSAny liquid that has a closed-cup flash point below
100°F, as determined by the standard test procedures.