N.Y. Comp. Codes R. & Regs. tit. 21, § 1025.15 – Flammable solids.

(a) Sodium, metallic dispersion in organic solvent, is restricted to a maximum quantity per vehicle of 6 quarts or 30 pounds gross weight; provided, however, the content of each outside container is one quart capacity or less.
(b) Ammonium picrate, picric acid, trinitrobenzene, trinitrobenzoic acid, trinitrotoluene or urea nitrate, wet, with not less than 10 percent water, not to exceed 16 ounces in each outside package, shipped as drugs, medicines or chemicals, when in glass bottles securely stoppered, each bottle enclosed in a strong fiber carton properly cushioned in the outside shipping case, are restricted to a maximum quantity per vehicle of 100 pounds gross weight.
(c) Flammable solids listed in section 1025.27 of this Part for reference to this subdivision are restricted to a maximum quantity per vehicle of 100 pounds gross weight; provided, however, such solids are in outside containers of 35 pounds gross weight or less.
(d) Flammable solids listed in section 1025.27 of this Part for reference to this subdivision are restricted to a maximum quantity per vehicle of 1,000 pounds gross weight; provided, however, such solids are in outside containers of 35 pounds gross weight or less.
(e) Flammable solids listed in section 1025.27 of this Part for reference to this subdivision are restricted to a maximum quantity per vehicle of 2,000 pounds gross weight; provided, however, such solids are in outside containers of 35 pounds gross weight or less.
(f) Motion picture film for exhibition purposes, processed, positive, nitrocellulose when packed in metal cases of a type specified by the U.S.D.O.T. regulations for the transportation of said film, not over four-reel capacity, is restricted to a maximum quantity per vehicle of 6,000 pounds gross weight; provided, however, it is not included in a load with other hazardous materials.
(g) Aluminum dross or magnesium dross is prohibited when shipped hot or when containing moisture liable to cause heating or fire during transportation.
(h) Flammable solids listed in section 1025.27 of this Part for reference to this subdivision are not restricted, regardless of quantity or size of containers.
(i) Any material listed in section 1025.27 of this Part and referenced to this subdivision may or may not be a flammable solid. When such material is not identified by the prescribed U.S.D.O.T. caution label for hazardous materials—and is known not to meet the description of a hazardous material—the material is allowed passage, provided the shipping order, bill of lading or other shipping paper shows the following certification:
This shipment conforms to Triborough Bridge and Tunnel Authority rules for the transportation of explosives and other hazardous materials via the Queens Midtown Tunnel, the Brooklyn-Battery Tunnel and the Verrazano-Narrows Bridge Lower Level.