49 CFR 172 Special Provision 23 (Numeric Codes)

These provisions are multi-modal and apply to bulk and non-bulk packagings.

Code	23
Description	This material may be transported under the provisions of Division 4.1 only if it is so packed that the percentage of diluent will not fall below that stated in the shipping description at any time during transport. Quantities of not more than 500 g per package with not less than 10 percent water by mass may also be classed in Division 4.1, provided a negative test result is obtained when tested in accordance with test series 6(c) of the UN Manual of Tests and Criteria (IBR, see §171.7 of this subchapter).
HazMat with this Code	UN 3317 - 2-Amino-4,6-Dinitrophenol, wetted with not less than 20 percent water by mass UN 1310 - Ammonium picrate, wetted with not less than 10 percent water, by mass UN 1320 - Dinitrophenol, wetted with not less than 15 percent water, by mass UN 1321 - Dinitrophenolates, wetted with not less than 15 percent water, by mass UN 1322 - Dinitroresorcinol, wetted with not less than 15 percent water, by mass UN 1336 - Nitroguanidine, wetted or Picrite, wetted with not less than 20 percent water, by mass UN 1337 - Nitrostarch, wetted with not less than 20 percent water, by mass UN 1347 - Silver picrate, wetted with not less than 30 percent water, by mass UN 1348 - Sodium dinitro-o-cresolate, wetted with not less than 15 percent water, by mass UN 1349 - Sodium picramate, wetted with not less than 20 percent water, by mass UN 1354 - Trinitrobenzene, wetted with not less than 30 percent water, by mass UN 1355 - Trinitrobenzoic acid, wetted with not less than 30 percent water, by mass UN 3364 - Trinitrophenol (picric acid), wetted, with not less than 10 percent water by mass UN 1356 - Trinitrotoluene, wetted or TNT, wetted, with not less than 30 percent water by mass UN 1357 - Urea nitrate, wetted with not less than 20 percent water, by mass UN 1517 - Zirconium picramate, wetted with not less than 20 percent water, by mass

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