{"id":13,"date":"2026-06-26T23:19:49","date_gmt":"2026-06-26T15:19:49","guid":{"rendered":"https:\/\/sdic-tcca.hbkaixuan.cn\/?p=13"},"modified":"2026-06-26T23:19:49","modified_gmt":"2026-06-26T15:19:49","slug":"sdic-56-vs-sdic-60-which-active-chlorine-content-should-you-buy-in-2026","status":"publish","type":"post","link":"https:\/\/sdic-tcca.hbkaixuan.cn\/?p=13","title":{"rendered":"SDIC 56% vs SDIC 60%: Which Active Chlorine Content Should You Buy in 2026?"},"content":{"rendered":"

Quick answer:<\/strong> Choose SDIC 60%<\/strong> if your priority is freight efficiency, premium markets, and effervescent tablet manufacturing (you ship 7% fewer kilograms per unit of active chlorine). Choose SDIC 56%<\/strong> for general distribution, price-sensitive markets, and widely available standard grade. SDIC 60% costs roughly 8\u201312% more per kilogram<\/strong> but typically saves 3\u20135% on total landed cost<\/strong> per ton of active chlorine delivered.<\/p>\n

Sodium Dichloroisocyanurate (SDIC) is supplied globally in two main grades: SDIC 56% (also called SDIC 56) and SDIC 60% (SDIC 60). For first-time buyers and even experienced distributors, the choice between them is not always straightforward. This guide breaks down the economics, applications, and supply chain realities of both grades.<\/p>\n

Chemical and Physical Differences<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Property<\/th>\nSDIC 56%<\/th>\nSDIC 60%<\/th>\n<\/tr>\n<\/thead>\n
Available Chlorine (min.)<\/td>\n56%<\/td>\n60%<\/td>\n<\/tr>\n
Moisture Content (max.)<\/td>\n3%<\/td>\n1%<\/td>\n<\/tr>\n
Appearance<\/td>\nWhite powder\/granular<\/td>\nWhite powder\/granular<\/td>\n<\/tr>\n
pH (1% solution)<\/td>\n6.0\u20137.0<\/td>\n6.0\u20137.0<\/td>\n<\/tr>\n
Solubility (25\u00b0C)<\/td>\n25 g\/100 ml water<\/td>\n25 g\/100 ml water<\/td>\n<\/tr>\n
Bulk Density<\/td>\n0.96 g\/cm\u00b3<\/td>\n1.00 g\/cm\u00b3<\/td>\n<\/tr>\n
Crystal Structure<\/td>\nDihydrate (2 H\u2082O molecules)<\/td>\nAnhydrous (no water)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The fundamental difference is crystallization water content<\/strong>. SDIC 56% is the dihydrate<\/em> form (Na(NCO)\u2083Cl\u2082\u00b72H\u2082O), while SDIC 60% is the anhydrous<\/em> form (Na(NCO)\u2083Cl\u2082). The 60% version simply has no water built into its crystal structure, so each gram contains more pure active material.<\/p>\n

Cost Economics: Total Landed Cost Comparison<\/h2>\n

Most distributors evaluate chemical cost in USD per ton of available chlorine<\/strong>, not per ton of raw product. Here is a typical 2026 calculation for a 20-ton bulk shipment from China to a major Asian port:<\/p>\n\n\n\n\n\n\n\n\n\n\n
Cost Element<\/th>\nSDIC 56%<\/th>\nSDIC 60%<\/th>\n<\/tr>\n<\/thead>\n
FOB price per ton<\/td>\nUSD 1,250<\/td>\nUSD 1,370<\/td>\n<\/tr>\n
Ocean freight (per ton)<\/td>\nUSD 110<\/td>\nUSD 110<\/td>\n<\/tr>\n
Insurance & duties (avg.)<\/td>\nUSD 85<\/td>\nUSD 92<\/td>\n<\/tr>\n
Landed cost per ton of product<\/strong><\/td>\nUSD 1,445<\/strong><\/td>\nUSD 1,572<\/strong><\/td>\n<\/tr>\n
Active chlorine per ton<\/td>\n560 kg<\/td>\n600 kg<\/td>\n<\/tr>\n
Landed cost per ton of active chlorine<\/strong><\/td>\nUSD 2,580<\/strong><\/td>\nUSD 2,620<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

In this example, SDIC 60% delivers nearly identical cost per active chlorine ton<\/strong> while shipping 6.7% less weight \u2014 meaning lower warehouse storage costs, fewer pallets, and reduced handling fees throughout the supply chain.<\/p>\n

Application Fit Analysis<\/h2>\n

When SDIC 56% Wins<\/h3>\n