subchapter c -- federal hazardous substances act regulations

(A) Flammable gas, Category 2: Gases,
other than extremely flammable gases, which,
at 20 deg.C and a standard pressure of 101.3
kPa, have a flammable range while mixed in
air.
(B) Flammable liquid, Category 2: Liquid
that has a flashpoint below 73 deg.F (23
deg.C) and an initial boiling point above 95
deg.F (35 deg.C).
(C) Flammable liquid, Category 3: Liquid
that has a flashpoint at or above 73 deg.F (23
deg.C) and at or below 140 deg.F (60 deg.C).
(D) Any mixture having one component or
more with a flashpoint at or above 100 deg.F
(37.8 deg.C) which comprises at least 99
percent of the total volume of the mixture is
not considered to be a flammable substance;
and
(E) Any mixture containing 24 percent or
less of water miscible alcohols, by volume, in
aqueous solution is not considered to be
flammable if the mixture does not present a
significant flammability hazard when used by
consumers.
(iii) The term combustible shall apply to
any liquids having a flashpoint at or above 140
deg.F (60 deg.C) to and including 200 deg.F
(93 deg.C) For the purpose of determining
labeling requirements under 16 CFR 1500.121,
“combustible” liquids are equivalently
identified as “flammable liquids, category
4”..The term “combustible” shall not apply to:
(A) Any mixture having one component or
more with a flashpoint higher than 150 deg.F
(65.6 deg.C) which comprises at least 99
percent of the total volume of the mixture; and
(B) Any mixture containing 24 percent or
less of water miscible alcohols, by volume, in
aqueous solution, if the mixture does not
present a significant flammability hazard when
used by consumers.
(iv) To determine flashpoint temperatures
for purposes of enforcing and administering
requirements of the Federal Hazardous
Substances Act applicable to ”extremely
flammable,“ ”flammable,“ and ”combustible”
hazardous substances, the Commission will
follow the procedures set forth in § 1500.43a.
However, the Commission will allow
manufacturers and labelers of substances and
products subject to those requirements to rely
on properly conducted tests using the
Tagliabue open-cup method which was in
effect prior to the issuance of § 1500.43a (as
16 CFR Ch. II (1–1–05 Edition)—proposed modificication – 6/25/06
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published at 38 FR 27012, September 27,
1973, and set forth below), and the defintions
of the terms ”extremely flammable,“
”flammable,“ and ”combustible” in this
section before its amendment (as published at
38 FR 27012, September 27, 1983, and
amended 38 FR 30105, November 1, 1973, set
forth in the note following this section) if all of
the following conditions are met:
(A) The substance or product was subject to
and complied with the requirements of the
Federal Hazardous Substances Act for
”extremely flammable,“ ”flammable,“ or
”combustible” hazardous substances before the
effective date of § 1500.43a; and
(B) No change has been made to the
formulation or labeling of such substance or
product after the effective date of 1500.43a,
prescribing a closed-cup test apparatus and
procedure.
(v) Extremely flammable solid means a
solid substance, other than metal powders, that
when tested by the method described in §
1500.44, yields results of (a) wetted zone does
not stop fire and (b) burning time < 45 s or
burning rate > 2.2 mm/s; for metal powders,
burning time ≤ 5 min. For the purposes
determining labeling requirements under 16
CFR 1500.121, “extremely flammable” solids
are equivalently identified as “flammable
solids, category 1”.
(vi) Flammable solid means a solid
substance, other than metal powders, that
when tested by the method described in §
1500.44, yields results of (a) stops the fire for
at least 4 min and (b) burning time < 45 s or
burning rate > 2.2 mm/s; for metal powders,
burning time > 5 min and ≤ 10 min. For the
purposes determining labeling requirements
under 16 CFR 1500.121, “flammable” solids
are equivalently identified as “flammable
solids, category 2”.
(vii) The definition of a flammable
aerosol (or self-pressurized container) is
classified in one of two categories on the basis
of its components, its chemical heat of
combustion and, if applicable the results of the
test methods described in § 1500.45 according
to the following:
(A) Extremely flammable aerosol, Category
1: Contents contain ≥ 85% flammable
components and has a heat of combustion ≥ 30
kJ/g. If contents do not contain ≤ 1%
flammable components and have a heat of
Deleted: substance having a flashpoint
above 20 deg.F (-6.7 deg.C) and below
100 deg.F (37.8 deg.C), as determined by
the method described at § 1500.43a,
except that:
Deleted: A
Deleted: B
Deleted: ignites and burns at an
ambient temperature of 80 deg.F or less
when subjected to friction, percussion, or
electrical spark.
Deleted: substance
Deleted: 100
Deleted: 37.8
Deleted: 150
Deleted: 65.6
Deleted: as determined by the test
method described at § 1500.43a, except
that
Deleted: is not considered to be a
combustible hazardous substance
Deleted: is not considered to be
combustible
Deleted: that, when tested by the
method described in § 1500.44, ignites
and burns with a self-sustained flame at a
rate greater than one-tenth of an inch per
second along its major axis.
Deleted: Extremely flammable contents
of self-pressurized container means
contents of a self-pressurized container
that, when tested by the method described
in § 1500.45, a flashback (a flame
extending back to the dispenser) is
obtained at any degree of valve opening
and the flashpoint, when tested by the
method described in § 1500.43a is less
than 20 deg.F (-6.7 deg.C).
(viii) Flammable contents of selfpressurized
container means contents of a
self-pressurized container that, when
tested by the method described in §
1500.45, a flame projection exceeding 18
inches is obtained at full valve opening,
or flashback (a flame extending back to
the dispenser) is obtained at any degree of
valve opening.