{"data":{"id":"us/49-cfr-176.84","jurisdiction":"us","citation":"49 CFR 176.84","heading":"Other requirements for stowage, cargo handling, and segregation for cargo vessels and passenger vessels.","body":"(a) General. When Column 10B of the § 172.101 Table refers to a numbered or alpha-numeric stowage provision for water shipments, the meaning and requirements of that provision are set forth in this section. Terms in quotation marks are defined in § 176.83. Other terms used in the table in this section such as “acids”, “chlorates” and “permanganates” indicate different chemical groups referred to here as segregation groups. Materials falling within a segregation group are considered to have certain similar chemical properties and, although not exhaustive in nature, the materials belonging to each group include those substances identified in section 3.1.4 of the IMDG Code (IBR, see § 171.7 of this subchapter) as set forth in § 176.83(m).\n(b) Table of provisions:\nCode Provisions\n1 [Reserved]\n2 Temperature controlled material.\n3 Do not stow with high explosives.\n4 Shall not be stowed together with combustible material in the same cargo transport unit.\n5 Stow “Separated from” powdered metals and their compounds.\n6 Emergency temperature material.\n7 [Reserved]\n8 Glass carboys not permitted on passenger vessels.\n9 Glass carboys not permitted under deck.\n10 Glass bottles not permitted under deck.\n11 Keep away from heat and open flame.\n12 Keep as cool as reasonably practicable.3\n13 Keep as dry as reasonably practicable.3\n14 For metal drums, stowage permitted under deck on cargo vessels.\n15 May be stowed in portable magazine or metal locker.\n16 No other cargo may be stowed in the same hold with this material.\n17 Segregation same as for flammable gases but “away from” dangerous when wet.\n18 Prohibited on any vessel carrying explosives (except explosives in Division 1.4, Compatibility group S).\n20 Segregation same as for corrosives.\n21 Segregation same as for flammable liquids.\n22 Segregation same as for flammable liquids if flash point is below 60 °C (140 °F).\n23 Segregation same as for flammable liquids if flash point is between 23 °C (73 °F) and 60 °C (140 °F).\n24 Segregation same as for flammable solids.\n25 Protected from sources of heat\n26 Stow “away from” acids.2\n27 Stow “away from” alkaline compounds. 2\n28 Stow “away from” flammable liquids.\n29 Stow “away from” ammonium compounds.\n30 Stow “away from” animal or vegetable oils.\n31 Stow “away from” combustible materials.\n32 Stow “away from” copper, its alloys and its salts.\n33 Stow “away from” fluorides.\n34 Stow “away from” foodstuffs.\n35 Stow “away from” all odor-absorbing cargo.\n36 Stow “away from” heavy metals and their compounds.\n37 Stow “away from” hydrazine.\n38 Stow “away from” all other corrosives.\n39 Stow “away from” liquid halogenated hydrocarbons.\n40 Stow “clear of living quarters”.\n41 Stow “away from” mercury and its compounds.\n42 Stow “away from” nitric acids and perchloric acids not exceeding 50 percent acid by weight.\n43 Stow “away from” organic materials.\n44 Stow “away from” oxidizers.\n45 Stow “away from” permanganates.\n46 Stow “away from” powdered metals.\n47 Stow “away from” sodium compounds.\n49 Stow “away from” corrosives.\n51 Stow “separated from” acetylene.\n52 Stow “separated from” acids. 1 2\n53 Stow “separated from” alkaline compounds. 2\n54 Stow “separated from” animal or vegetable oils.\n55 Stow “separated from” ammonia.\n56 Stow “separated from” ammonium compounds.\n57 Stow “separated from” chlorine.\n58 Stow “separated from” cyanides.\n59 Stow “separated from” combustible materials.\n60 Stow “separated from” chlorates, chlorites, hypochlorites, nitrites, perchlorates, permanganates, and metallic powders.\n61 Stow “separated from” corrosive materials.\n62 Stow “separated from” diborane.\n63 Stow “separated from” diethylene triamine.\n64 Stow “separated from” explosives.\n65 Stow “separated from” flammable substances.\n66 Stow “separated from” flammable solids.\n67 Stow “separated from” halides.\n68 Stow “separated from” hydrogen.\n69 Stow “separated from” hydrogen peroxide.\n70 Stow “separated from” mercury salts.\n71 Stow “separated from” nitric acid.\n72 Stow “separated from” nitrogen compounds.\n73 Stow “separated from” chlorates.\n74 Stow “separated from” oxidizers.\n75 Stow “separated from” permanganates.\n76 Stow “separated by a complete compartment or hold from” organic peroxides.\n77 Stow “separated longitudinally by a complete compartment or hold from” explosives.\n78 Stow “separated longitudinally by an intervening complete compartment or hold from” explosives.\n79 The maximum net quantity in one package for this material shipped aboard a passenger vessel is limited to 22.7 kg (50 pounds).\n80 Toy torpedoes must not be packed with other special fireworks.\n81 Under deck stowage permitted only if an indicating substance such as chloropicrin has been added.\n82 Under deck stowage is permitted only if containing not more than 36 percent by weight of hydrazine.\n83 [Reserved]\n84 Under deck stowage must be in well-ventilated space.\n85 Under deck stowage must be in mechanically ventilated space.\n86 Stow “separated by a complete compartment or hold from” explosives Division 1.3.\n87 Stow “separated from” Class 1 (explosives) except Division 1.4.\n88 Stow “separated by a complete compartment or hold from” Class 1 (explosives) except Division 1.4.\n89 Segregation same as for oxidizers.\n90 Stow “separated from” radioactive materials.\n91 Stow “separated from” flammable liquids.\n92 Stow “separated from” powdered materials.\n93 Stow not accessible to unauthorized persons on passenger vessels.\n94 Plastic jerricans and plastic drums not permitted under deck.\n95 Stow “separated from” foodstuffs.\n96 Glass carboys not permitted under deck on passenger vessels.\n97 Stow “away from” azides.\n98 Stow “away from” all flammable materials.\n99 Only new metal drums permitted on passenger vessels.\n100 Stow “away from” flammable solids.\n101 Stow “separated from” iron oxide.\n102 Stow “separated from” all odor absorbing cargoes.\n103 Only to be loaded under dry weather conditions.\n104 Stow “separated from” bromine.\n105 As approved by the Competent Authority of the country concerned.\n106 Stow “separated from” powdered metal.\n107 Stow “separated from” peroxides and superoxides.\n108 The transport temperature should be indicated on the tank.\n109 Label as a flammable liquid if flash point is 60 °C (140 °F) or below.\n110 Packaging Group II if concentration does not exceed 70 percent acid.\n111 If concentration exceeds 50 percent acid, notes 66, 74, 89, and 90 apply.\n112 Packaging Group II for concentrations not less that 50 percent and Packaging Group III for concentrations less than 50 percent.\n113 Packaging Group II if concentrations does not exceed 60 percent acid.\n114 Corrosive subsidiary risk label required unless concentration is less than 80 percent.\n115 If packaged in glass or earthenware inner packagings in wooden or fiberboard outer packagings, the maximum quantity on any vessel is 500 kg (equivalent to 450 L).\n116 In a cargo space capable of being opened up in an emergency. The possible need to open hatches in case of fire to provide maximum ventilation and to apply water in an emergency and the consequent risk to the stability of the ship through flooding of the cargo space should be considered before loading.\n117 In a clean cargo space capable of being opened up in an emergency. In the case of bagged fertilizer in freight containers, it is sufficient if in the case of an emergency, the cargo is accessible through free approaches (hatch entries) and mechanical ventilation enables the master to exhaust any gases or fumes resulting from decomposition. The possible need to open hatches in case of fire to provide maximum ventilation and to apply water in an emergency and the consequent risk to the stability of the ship through flooding of the cargo space should be considered before loading.\n118 Stowage—Category D, Category E freight containers and pallet boxes only. Ventilation may be required. The possible need to open hatches in a case of fire to provide maximum ventilation and to supply water in an emergency, and the consequent risk to the stability of the ship through flooding of the cargo space, should be considered before loading.\n119 Double strip stowage recommended.\n120 Provide good surface and through ventilation.\n121 Packaging group III when the flash point of the flammable liquid is 23 °C (73 °F) or above.\n122 Stow “separated from” infectious substances.\n123 Stow “away from” infectious substances.\n124 Stow “separated from” bromates.\n125 Segregation same as for flammable liquids, but also “away from” flammable solids.\n126 Segregation same as for Class 9, miscellaneous hazardous materials.\n127 For packages carrying a subsidiary risk of Class 1 (explosives), segregation same as for Class 1, Division 1.3.\n128 Stow in accordance with the IMDG Code, Sub-section 7.6.2.7.2 (incorporated by reference; see § 171.7 of this subchapter).\n129 Stowage Category A applies, except for uranyl nitrate hexahydrate solution for which Category D applies.\n130 Stowage Category A applies, except for uranyl nitrate hexahydrate solution, uranium metal hexahydrate solution, uranium metal pyrophoric and thorium metal pyrophoric for which Category D applies.\n131 Stowage Category A applies, except for uranyl nitrate hexahydrate solution, uranium metal pyrophoric and thorium metal pyrophoric for which Category D applies, and taking into account any supplementary requirements specified in the transport documents.\n132 Stowage A applies, taking into account any supplementary requirements specified in the transport documents.\n133 Stow “separated from” sulfur.\n134 Stow “separated from” UN2716.\n135 Stow “Separated from” mercury and mercury compounds.\n136 Stow “Separated from” carbon tetrachloride.\n137 For arsenic sulphides, Stow “separated from” acids.\n138 Stow “Separated from” peroxides.\n141 Stow “away from” radioactive materials.\n142 Packages in cargo transport units must be stowed so as to allow for adequate air circulation throughout the cargo.\n144 When stowed under deck, mechanical ventilation shall be in accordance with SOLAS, Chapter II-2/Regulation 19 (IBR, see § 171.7 of this subchapter) for flammable liquids with flashpoint below 23 °C (73 °F).\n145 Stow “separated from” ammonium compounds except for UN1444.\n146 Category B stowage applies for unit loads in open cargo transport units.\n147 Stow “separated from” flammable gases and flammable liquids.\n148 In addition: from flammable gases and flammable liquids when stowed on deck of a containership a minimum distance of two container spaces athwartship shall be maintained, when stowed on ro-ro ships a distance of 6 m athwartship shall be maintained.\n149 For engines or machinery containing fuels with flash point equal or greater than 23 °C (73.4 °F), stowage Category A.\n150 For uranium metal pyrophoric and thorium metal pyrophoric stowage, category D applies.\n151 Segregation as for Class 7.\n152 Segregation as for Class 8. However, in relation to Class 7, no segregation needs to be applied.\n153 Stow “separated longitudinally by an intervening complete compartment or hold from” Divisions 1.1, 1.2, and 1.5.\n154 Notwithstanding the stowage category indicated in column 10A of the § 172.101 Table, may be stowed in accordance with the provisions of packing instruction US 1 in § 173.62.\n155 Avoid handling the package or keep handling to a minimum. Inform the appropriate public health authority or veterinary authority where persons or animals may have been exposed.\n156 For lithium batteries transported in accordance with § 173.185(f) or for purposes of disposal or recycling, stowage category C applies.\n157 For aerosols and gas receptacles transported for purposes of recycling or disposal, stowage category C applies, and stowage must be clear of living quarters.\nM1—M6 [Reserved]\n1 For waste cyanides or waste cyanide mixtures or solutions, refer to § 173.12(e) of this subchapter.\n2 Class 8 materials in PG II or III that otherwise are required to be segregated from one another may be transported in the same cargo transport unit, whether in the same packaging or not, provided the substances do not react dangerously with each other to cause combustion and/or evolution of considerable heat, or of flammable, toxic or asphyxiant gases, or the formation of corrosive or unstable substances; and the package does not contain more than 30 L (7.8 gallons) for liquids or 30 kg (66 lbs.) for solids.\n3 These requirements apply to the loading of hazardous materials in cargo transport units as well as the stowage of cargo transport units.\n(c) Provisions for the stowage of Class 1 (explosive) materials: (1) Explosive substances and explosive articles must be stowed in accordance with Column (10A) and Column (10B) of the 172.101 Table of this subchapter.\n(2) The following notes in column 10B of the § 172.101 Table apply to the transport of Class 1 (explosive) materials by vessel:\nNotes Provisions\n5E Stow “away from” lead and its compounds.\n14E On deck, cargo transport unit must be steel.\n15E On deck, cargo transport unit must be leakproof.\n17E On deck stowage is recommended.\n19E “Separated from” explosives containing chlorates or perchlorates.\n21E Cargo space ventilation must be carefully controlled to avoid excessive condensation.\n22E “Separated from” ammonium compounds and explosives containing ammonium compounds or salts.\n23E “Separated from” Division 1.4 and “separated longitudinally by an intervening complete compartment or hold from” Division 1.1, 1.2, 1.3, 1.5, and 1.6 except from explosives of compatibility group J.\n26E For closed cargo transport units, a non-metallic lining is required when not in effectively sealed, sift-proof packages.\n27E For closed cargo transport units, a non-metallic lining is required.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS","PART 176—CARRIAGE BY VESSEL","Subpart D—General Segregation Requirements"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"868d858c81370bb9de70aa2b9d54b623994fdb4c4041afa0b0a2dd0e216d346a","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-176.83","next":"us/49-cfr-176.88"},"notice":"GroundRules: Original legal text. Not legal advice."}