{"id":7739,"date":"2017-09-01T12:18:17","date_gmt":"2017-09-01T16:18:17","guid":{"rendered":"http:\/\/blog.thecompliancecenter.com\/?p=7739"},"modified":"2025-09-08T00:42:30","modified_gmt":"2025-09-08T04:42:30","slug":"inhalation-hazards-tdg-marking-documentation","status":"publish","type":"post","link":"https:\/\/www.thecompliancecenter.com\/ca\/help-center\/articles\/inhalation-hazards-tdg-marking-documentation\/","title":{"rendered":"Inhalation Hazards \u2013 TDG Marking & Documentation"},"content":{"rendered":"

\"\"<\/p>\n

Changes in Special Provision 23<\/h2>\n

One aspect of the International Harmonization amendment (SOR\/2017-137) of the Canadian Transportation of Dangerous Goods Regulations (TDGR) that did not receive a lot of attention is the change in Special Provision 23. This special provision (SP) deals with the assignment of markings on containers and descriptions on shipping documents for entries related to goods which exhibit inhalation toxicity. Although the basic concept for classification remains the same- i.e. gases in Class 2.3 and Class 6.1 with associated inhalation toxicity. The majority of the latter are in PG I, but there are several PG II entries invoking SP23).<\/p>\n

Marking – Keep It Simple?<\/h4>\n

A significant difference is the change in wording applied to means of containment (MoC). Following the transition period, markings required under SP23 must read \u201cinhalation hazard\u201d for all entries except UN 1005 (anhydrous ammonia). This eliminates the previous options of either \u201ctoxic by inhalation\u201d or \u201ctoxic-inhalation hazard\u201d (TBI or TIH).<\/p>\n

UN1005 retains the previous wording \u201cAnhydrous Ammonia, Inhalation Hazard\u201d when the option of using the ammonia placard (rather than Class 2.3) is chosen. However small MoC of UN1005 will use the standard Class 2.3 label and \u201cinhalation hazard\u201d wording.<\/p>\n

Size Matters<\/h4>\n

Letter Size<\/strong>
\nThe new SP23 simplifies things somewhat by referencing the specific sections of Part 4 that apply- i.e. 4.18.2 for UN1005 and 4.23 for the rest. These sections include specifications for the height and \u201cwidth\u201d of letters depending on the type of MoC.<\/p>\n

Note: presumably the \u201cwidth\u201d refers to the strike width, not the actual total letter width!<\/p>\n

Documentation Not Affected<\/h4>\n

Despite the changes above, the wording required on a shipping document under SP23 remains the same. SP23 now just references TDGR Part 3, specifically 3.5(1)(c)(vii), for the wording. This paragraph was not affected by SOR\/2017-137 and still requires the TBI or TIH options.<\/p>\n

Note also that the requirements for SP106 regarding petroleum crude oil with high hydrogen sulphide were not affected by the amendment. The previous wording options will continue to be required for UN1267 or UN3494 meeting the inhalation toxicity criteria (note that \u201csour crude\u201d is termed such based on its total sulphur content. Sulphur can be present bound to carbon, as elemental sulphur or hydrogen sulphide- only the latter affects the SP106 status. The current review of sour crude oil, outlined in the discussion paper for a proposed \u201cCanadian Update Amendment, expected in Canada Gazette I by year end, may revise this entry in the future.<\/p>\n

INHALATION HAZARDS TDGR AT 2018-01-12 (SOR\/2017-137)<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
ASPECT<\/strong><\/th>\nTYPE<\/strong><\/th>\nANHYDROUS AMMONIA UN1005<\/strong><\/th>\nOTHER SP23<\/strong><\/th>\nCRUDE OIL SP106<\/strong> (UN1267 or UN3494)<\/strong><\/th>\n<\/tr>\n<\/thead>\n
WORDING<\/th>\nSmall MoC<\/td>\n\u201cinhalation hazard\u201d<\/td>\nInhalation hazard words not required<\/td>\n<\/tr>\n
<\/th>\nLarge MoC<\/td>\n“Anhydrous Ammonia, Inhalation Hazard”<\/td>\n\u201cinhalation hazard\u201d<\/td>\n\u201ctoxic-inhalation hazard\u201d or \u201ctoxic by inhalation\u201d<\/td>\n<\/tr>\n
LETTER SIZE<\/th>\nSmall MoC<\/td>\n\u2265 12 mm high<\/td>\nNot applicable<\/td>\n<\/tr>\n
<\/th>\nTank Cars<\/td>\n\u2265 6 mm wide x \u2265 100 mm high<\/td>\nNot specified<\/td>\n<\/tr>\n
<\/th>\nIBC\/Portable Tanks<\/td>\n\u2265 4 mm wide x \u2265 25 mm high<\/td>\n<\/tr>\n
<\/th>\nOther large MoC<\/td>\n\u22656 mm wide x \u226550 mm high<\/td>\n<\/tr>\n
WORDING LOCATION<\/th>\nSmall MoC<\/td>\nNext to shipping name<\/td>\nNot applicable.<\/td>\n<\/tr>\n
<\/th>\nLarge MoC<\/td>\nTwo sides<\/td>\nTwo opposite sides<\/td>\n\u201cnext to the placard for the primary class\u201d<\/td>\n<\/tr>\n
SHIPPING DOCUMENT<\/th>\nShipping description- all<\/td>\n\u201ctoxic by inhalation\u201d or \u201ctoxic-inhalation hazard\u201d; following the PG, or, if no PG, the shipping name<\/td>\n\u201ctoxic by inhalation\u201d or \u201ctoxic-inhalation hazard\u201d; following the PG<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

As always if you should need help understanding the regulations reach out to our regulatory team or give us a call at 888.442.9628 in the USA and 888.977.4834 in Canada.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Changes in Special Provision 23 One aspect of the International Harmonization amendment (SOR\/2017-137) of the Canadian Transportation of Dangerous Goods…<\/p>\n","protected":false},"author":12552,"featured_media":205394,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[2365,2413,5069,5074,5086,5088],"tags":[2892,3105],"class_list":["post-7739","post","type-post","status-publish","format-standard","has-post-thumbnail","category-regulations-cat","category-tdg-regulation-updates","category-ground-transportation","category-tdgr","category-labeling","category-documentation","tag-amendments","tag-inhalation-hazard"],"acf":[],"yoast_head":"\nInhalation Hazards \u2013 TDG Marking & Documentation - ICC Compliance Center Inc - Canada<\/title>\n<meta name=\"description\" content=\"In the new TDG amendment (SOR\/2017-137) Special Provision 23 was updated in regard to Inhalations Hazards marking and documentation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"\/ca\/wp-json\/wp\/v2\/posts\/7739\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Inhalation Hazards \u2013 TDG Marking & Documentation - 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