{"id":3208,"date":"2024-02-19T07:41:39","date_gmt":"2024-02-19T07:41:39","guid":{"rendered":"https:\/\/www.bdtrans.es\/industrial-transport-specialized-in-adr\/adr-class-5-2\/"},"modified":"2024-03-06T11:45:45","modified_gmt":"2024-03-06T11:45:45","slug":"adr-class-5-2","status":"publish","type":"page","link":"https:\/\/www.bdtrans.es\/en\/industrial-transport-specialized-in-adr\/adr-class-5-2\/","title":{"rendered":"ADR Class 5.2"},"content":{"rendered":"\t\t
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ADR Class 5.2<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Organic Peroxides<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Substances of Class 5.2 are those that refer to organic peroxides and preparations of organic peroxides. These are materials with an O-O structure that can be considered derivatives of hydrogen peroxide, where the hydrogen groups are replaced by organic radicals.<\/p>\n

Class 5.2 materials are subdivided as follows:<\/p>\n

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  • P1<\/strong> – Organic peroxides that do not require temperature regulation.<\/li>\n
  • P2<\/strong> – Organic peroxides requiring temperature regulation.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Properties of Organic Peroxides<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Substances and objects of Class 4.2 may be classified as follows:<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Organic peroxides are subject to exothermic decomposition at normal or elevated temperatures. Decomposition may be due to heat, impurities, rubbing or shock. Decomposition may result in the release of flammable or noxious vapors or gases. For certain organic peroxides, temperature regulation is necessary; under confined conditions they can undergo explosive decomposition.<\/p>\n

    The explosive characteristic can be limited by the introduction of diluents or by using suitable containers\/packaging. Organic peroxides cause serious eye damage to the cornea, even after brief contact or corrosive to the skin. It has the particularity of self-igniting by itself, if the appropriate circumstances are met, without the need to mix with combustible and\/or flammable materials, since P.O. itself is flammable organic matter, apart from its oxidizing nature.<\/p>\n

    Any material is considered to be of Class 5.2 when the organic peroxide preparation complies with the following:<\/p>\n

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    • Contain more than 1% active oxygen and a maximum of 1% hydrogen peroxide.<\/li>\n
    • Contain more than 0.5% maximum of active oxygen and 7% maximum of hydrogen peroxide.<\/li>\n<\/ul>\n

      Organic peroxides are classified into seven types ranging from A to G. Type A is not acceptable for transport as the packaging in which the test is produced is unsatisfactory. Type G is exempt from the provisions of this chapter for organic peroxides. The classification ranging from B to F is given by the maximum quantity of material allowed per package according to packing instruction IBC520 for IBC’s and P520 for packages with the packing methods described in OP1 to OP8 for the latter. Those Organic Peroxides which are allowed to be transported in tanks according to chapter 4.2 (portable tanks) and 4.3 (ADR tanks) are listed in 4.2.5.2 under the transport instruction for portable tanks T23.<\/p>\n

      The collective headings need to be specified:<\/p>\n

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      • The type ranging from B to F of the organic peroxide.<\/li>\n
      • The physical state of matter.<\/li>\n
      • Temperature regulation if it presents TDAA (the minimum temperature at which matter undergoes thermal decomposition, explosive, etc.).<\/li>\n<\/ul>\n

        The mixtures of organic peroxides can be assimilated to that of the most dangerous peroxide of the composition and transported under the conditions foreseen by the latter. Two stable P.O.’s mixed together may result in an unstable mixture so it will be necessary to determine the TDAA and the regulation and critical temperature calculated according to provision 2.2.52.1.16.<\/p>\n

        Organic peroxides already classified whose transport is authorized according to the list of organic peroxides already classified can be transported in packaging, IBCs and portable tanks. Those not on this list must be authorized for transport by the competent authority.<\/p>\n

        The competent authority of the country of origin shall carry out the classification of the organic peroxides not listed in 2.2.52.4 or in 4.1.4.2 P502 or in 4.2.5.2 T23 portable tank transport instruction, in order to finally assign a collective heading as well as the declaration of approval indicating the classification and the applicable conditions of carriage dictated by the Contracting Party, either the country of origin or the consignee.<\/p>\n

        To ensure the safety of organic peroxides, desensitizers are added, desensitizing them in such a way that in case of leakage the peroxide is not concentrated. Diluents can be liquid or solid organic materials, solid inorganic materials or water.<\/p>\n

        Type A diluents are organic liquids that are compatible with organic peroxide and have a boiling point of at least 150\u00b0C.<\/p>\n

        Type B diluents are organic liquids compatible with organic peroxides with a boiling point below 150 but equal to 60\u00baC and a flash point of at least 5\u00baC.<\/p>\n

        Type B diluents can be used to desensitize all P.O. as long as their boiling point is 60\u00baC higher than the TDAA of the P.O. in a package for a maximum weight of 50Kg.<\/p>\n

        The total or partial substitution of a diluent A or B by another diluent with different properties requires an evaluation of the preparations on the basis of the classification for class 5.2. Solid organic and inorganic materials can be used for desensitizing provided they are compatible, without altering the thermal stability and hazard class of the preparation.<\/p>\n

        Water may be used for desensitizing whenever indicated in list 2.2.52.4 or by decision of the competent authority with the indication with water or dispersion with water.<\/p>\n

        Solid organic and inorganic materials can be used for desensitizing as long as they are compatible with the P.O. without altering the thermal stability or hazardousness of the preparation.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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        Provisions relating to temperature control<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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        By definition, it is the maximum temperature at which an organic peroxide can be transported without risk. The temperature that a package can reach in a vehicle within 24 hours may exceed a temperature of 55\u00baC. In case of failure in the regulation system, emergency procedures will be applied. The critical temperature justifies the implementation of emergency procedures.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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        The following organic peroxides are subject to temperature regulation during transport:<\/p>\n

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        • Type B and C organic peroxides having TDAA less than or equal to 50\u00baC.<\/li>\n
        • Type D organic peroxides having TDAA less than or equal to 50\u00baC or 45\u00baC.<\/li>\n
        • Organic peroxides type E and F having a TDAA less than or equal to 45\u00baC.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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          Type of container<\/th>\nTDAA<\/th>\nControl temperature<\/th>\nCritical temperature<\/th>\n<\/tr>\n<\/thead>\n
          Containers\/Single packs and IBCs\/IBCs<\/td>\n\u226420\u00baC<\/td>\n20\u00baC below TDAA<\/td>\n10\u00baC below TDAA<\/td>\n<\/tr>\n
          >20\u00baC \u2264 35\u00baC<\/td>\n15\u00baC below TDAA<\/td>\n10\u00baC below TDAA<\/td>\n<\/tr>\n
          >35\u00baC<\/td>\n10\u00baC below TDAA<\/td>\n5\u00baC below TDAA<\/td>\n<\/tr>\n
          Cisterns<\/td>\n\u226450\u00baC<\/td>\n10\u00baC below TDAA<\/td>\n5\u00baC below TDAA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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          The temperature for transport may be lower than the regulation temperature but not too low so as not to cause phase separation between diluent and organic peroxide.<\/p>\n

          The regulation and critical temperature is given in table 2.2.52.4 , the actual temperature for transport may be lower but not enough to generate phase separation.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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          Class 4.2 packing groups<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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          The criteria to establish the packing groups as well as the criteria to establish if it belongs to a class are:<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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          • Pyrophoric substances should be included in packing group I.<\/li>\n
          • Substances that undergo spontaneous heating on a cubic sample of 2.5 cm of side at 140\u00baC for 24 hours, if it shows spontaneous ignition or heating of more than 200\u00baC, are considered as packing group II.<\/li>\n
          • <\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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            • Materials that undergo spontaneous heating, if a temperature of 140\u00baC is applied to a cubic sample of 2.5 cm for 24 hours, spontaneous ignition or a temperature increase of 200\u00baC is not observed, but if the cubic sample passes to 10cm on a side if it is observed, it will be considered as packing group III.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

              ADR Class 5.2 Organic Peroxides Substances of Class 5.2 are those that refer to organic peroxides and preparations of organic […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":3093,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-3208","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.bdtrans.es\/en\/wp-json\/wp\/v2\/pages\/3208","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bdtrans.es\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bdtrans.es\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bdtrans.es\/en\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bdtrans.es\/en\/wp-json\/wp\/v2\/comments?post=3208"}],"version-history":[{"count":1,"href":"https:\/\/www.bdtrans.es\/en\/wp-json\/wp\/v2\/pages\/3208\/revisions"}],"predecessor-version":[{"id":3211,"href":"https:\/\/www.bdtrans.es\/en\/wp-json\/wp\/v2\/pages\/3208\/revisions\/3211"}],"up":[{"embeddable":true,"href":"https:\/\/www.bdtrans.es\/en\/wp-json\/wp\/v2\/pages\/3093"}],"wp:attachment":[{"href":"https:\/\/www.bdtrans.es\/en\/wp-json\/wp\/v2\/media?parent=3208"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}