{"id":5559,"date":"2026-07-16T15:53:43","date_gmt":"2026-07-16T13:53:43","guid":{"rendered":"https:\/\/levosil.com\/?p=5559"},"modified":"2026-07-12T10:49:15","modified_gmt":"2026-07-12T08:49:15","slug":"conformita-mil","status":"publish","type":"post","link":"https:\/\/levosil.com\/en\/conformita-mil\/","title":{"rendered":"Levosil desiccant bags are compliant with MIL-D-3464"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\"><\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Short answer<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Yes.<\/strong>&nbsp;Levosil desiccant bags filled with&nbsp;<strong>silica gel<\/strong>&nbsp;and&nbsp;<strong>activated clay<\/strong>&nbsp;comply with the U.S. military specification&nbsp;<strong>MIL-D-3464E<\/strong>&nbsp;(<em>Desiccants, Activated, Bagged, Packaging Use and Static Dehumidification<\/em>), in&nbsp;<strong>Type I<\/strong>&nbsp;(clay) and&nbsp;<strong>Type II<\/strong>(silica gel) configurations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Compliance is possible because our bags use&nbsp;<strong>adsorbent, non-deliquescent<\/strong>&nbsp;desiccants, as required by clause 3.2.1 of the standard. The&nbsp;<strong>Levodry Gel<\/strong>&nbsp;(calcium chloride based) meets a different requirement \u2014 protection of goods inside shipping containers \u2014 and, by its chemical nature, falls outside the scope of MIL-D-3464.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">What MIL-D-3464E requires<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">MIL-D-3464E, issued by the U.S. Department of Defense in 1987, defines the requirements for&nbsp;<strong>bagged desiccants used in military and industrial packaging<\/strong>&nbsp;to prevent corrosion and mildew in enclosed spaces.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Key requirements of the standard:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Non-deliquescent material<\/strong>\u00a0(clause 3.2.1): the desiccant must not liquefy upon water uptake.<\/li>\n\n\n\n<li><strong>Minimum adsorption capacity<\/strong>: 3.00 g of water vapor at 20% RH and 6.00 g at 40% RH, per desiccant unit, at 25 \u00b0C.<\/li>\n\n\n\n<li><strong>Maximum unit weight<\/strong>: 50 g per unit.<\/li>\n\n\n\n<li><strong>Reactivation<\/strong>: after regeneration at 118.3 \u00b0C, the bag must retain at least 90% of its original capacity.<\/li>\n\n\n\n<li><strong>Three classifications<\/strong>:\n<ul class=\"wp-block-list\">\n<li><strong>Type I<\/strong>\u00a0\u2014 general purpose (typically clay)<\/li>\n\n\n\n<li><strong>Type II<\/strong>\u00a0\u2014 non-dusting (typically silica gel in Tyvek\u00ae)<\/li>\n\n\n\n<li><strong>Type III<\/strong>\u00a0\u2014 specific conditions (8 and 16 units only)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Why silica gel complies and calcium chloride does not<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The technical distinction is chemical and relates to how the material captures moisture.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Adsorption (silica gel, clay, molecular sieves)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Water vapor is&nbsp;<strong>trapped on the porous surface<\/strong>&nbsp;of each granule by physical forces. The material remains&nbsp;<strong>solid, dry, non-deliquescent<\/strong>. It can be regenerated in an oven. It meets clause 3.2.1 of MIL-D-3464E.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Absorption (calcium chloride)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Calcium chloride is&nbsp;<strong>deliquescent<\/strong>: it captures moisture and&nbsp;<strong>turns into a saline liquid solution<\/strong>, retained inside the bag by a gelling matrix and impermeable envelope. Its absorption capacity is much higher than silica gel (up to 300% of its weight), but it&nbsp;<strong>does not satisfy the non-deliquescence requirement<\/strong>&nbsp;of MIL-D-3464E.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is why&nbsp;<strong>Levodry Gel<\/strong>&nbsp;is designed for a different reference standard:&nbsp;<strong>DIN 55474<\/strong>&nbsp;(protection of goods in shipping containers) and&nbsp;<em>container rain<\/em>&nbsp;prevention practices.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Levosil compliance matrix by product family<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Product<\/th><th>Desiccant<\/th><th>MIL-D-3464E<\/th><th>DIN 55473<\/th><th>REACH<\/th><th>UFI \/ CLP<\/th><\/tr><\/thead><tbody><tr><td>Desiccant bags<\/td><td>Silica gel<\/td><td>\u2713 Type II<\/td><td>\u2713 Type A\/B\/Tyvek\u00ae<\/td><td>\u2713<\/td><td>Not required<\/td><\/tr><tr><td>Desiccant bags<\/td><td>Activated clay<\/td><td>\u2713 Type I<\/td><td>\u2713 Type A\/B<\/td><td>\u2713<\/td><td>Not required<\/td><\/tr><tr><td>Desiccant bags<\/td><td>Molecular sieves<\/td><td>\u2013<\/td><td>\u2713<\/td><td>\u2713<\/td><td>Not required<\/td><\/tr><tr><td>Levodry Gel<\/td><td>Calcium chloride<\/td><td>Out of scope (deliquescent)<\/td><td>\u2013<\/td><td>\u2713<\/td><td>\u2713 <\/td><\/tr><tr><td>Pharma Micro Bag<\/td><td>Silica gel \/ sieves<\/td><td>\u2713 Type II<\/td><td>\u2713 Tyvek\u00ae<\/td><td>\u2713<\/td><td>Not required<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The UFI (<em>Unique Formula Identifier<\/em>) is mandatory since 1 January 2021 under Regulation (EU) 2017\/542 and Annex VIII of the CLP, but only for mixtures classified as hazardous. Levodry Gel is notified through the ECHA PCN portal and the Italian ISS. Silica gel, clay and molecular sieve bags do not require UFI notification because they are not hazardous mixtures under the CLP.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">What &#8220;MIL-D-3464 compliant&#8221; means in practice<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A MIL-D-3464 compliant bag must guarantee four things:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Measurable performance<\/strong>\u00a0\u2014 adsorption verified under standard conditions.<\/li>\n\n\n\n<li><strong>Chemical safety<\/strong>\u00a0\u2014 non-deliquescent, non-corrosive toward steel, brass, aluminum, magnesium (clause 3.11).<\/li>\n\n\n\n<li><strong>Reusability<\/strong>\u00a0\u2014 reactivable by oven drying.<\/li>\n\n\n\n<li><strong>Traceability<\/strong>\u00a0\u2014 labeling that identifies nomenclature, specification, type, number of units, reactivation temperature and time, manufacturer.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Levosil has been manufacturing bags that meet these characteristics since 1964, from its plant in Chiusa di San Michele (Turin, Italy), with ISO 9001 and ISO 15378 (pharmaceutical primary packaging) certifications.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Levosil&#8217;s complete regulatory set<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Levosil is among the few European desiccant bag manufacturers covering the full regulatory spectrum:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>MIL-D-3464E<\/strong>\u00a0(U.S. military specification) \u2014 silica gel and clay bags<\/li>\n\n\n\n<li><strong>DIN 55473<\/strong>\u00a0(German packaging desiccant standard) \u2014 Type A and B<\/li>\n\n\n\n<li><strong>DIN 55474<\/strong>\u00a0(desiccant sizing for maritime packaging) \u2014 Levodry Gel<\/li>\n\n\n\n<li><strong>REACH<\/strong>\u00a0(EC Regulation 1907\/2006) \u2014 all raw materials<\/li>\n\n\n\n<li><strong>UFI \/ CLP<\/strong>\u00a0(EU Regulation 2017\/542, CLP Annex VIII) \u2014 Levodry Gel notified<\/li>\n\n\n\n<li><strong>ISO 9001<\/strong>\u00a0(quality) and\u00a0<strong>ISO 15378<\/strong>\u00a0(pharmaceutical GMP primary packaging)<\/li>\n\n\n\n<li><strong>FSC\u00ae Chain of Custody<\/strong>\u00a0\u2014 certified paper for envelopes<\/li>\n\n\n\n<li><strong>DMF-free<\/strong>\u00a0(Commission Decision 2009\/251\/EC) \u2014 declaration of conformity available<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">How to request the MIL-D-3464 declaration of conformity<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The MIL-D-3464E declaration of conformity for Levosil bags is issued upon request, referenced to the production lot. It includes desiccant type, number of units, verified adsorption capacity, recommended reactivation temperature and time, and envelope information (Type A, Type B, Tyvek\u00ae).<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">You can contact us now for more information:&nbsp;<strong>0039 011 96 43 430<\/strong><br>\ud83d\udce7&nbsp;<strong><a href=\"mailto:info@levosil.com\">info@levosil.com<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Short answer Yes.&nbsp;Levosil desiccant bags filled with&nbsp;silica gel&nbsp;and&nbsp;activated clay&nbsp;comply with the U.S. military specification&nbsp;MIL-D-3464E&nbsp;(Desiccants, Activated, Bagged, Packaging Use and Static Dehumidification), in&nbsp;Type I&nbsp;(clay) and&nbsp;Type II(silica gel) configurations. Compliance is possible because our bags use&nbsp;adsorbent, non-deliquescent&nbsp;desiccants, as required by clause 3.2.1 of the standard. The&nbsp;Levodry Gel&nbsp;(calcium chloride based) meets a different requirement \u2014 protection of goods [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":5555,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54,77],"tags":[41,75,40,76],"class_list":["post-5559","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-informazioni-tecniche","category-regulation","tag-desiccant","tag-mil","tag-natural-activated-clay","tag-standards"],"_links":{"self":[{"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/posts\/5559","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/comments?post=5559"}],"version-history":[{"count":1,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/posts\/5559\/revisions"}],"predecessor-version":[{"id":5560,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/posts\/5559\/revisions\/5560"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/media\/5555"}],"wp:attachment":[{"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/media?parent=5559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/categories?post=5559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/levosil.com\/en\/wp-json\/wp\/v2\/tags?post=5559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}