SDIC 60 — High-Strength Sodium Dichloroisocyanurate for Water Programs

SDIC 60 is the highest available chlorine grade of sodium dichloroisocyanurate on the market, supplying a minimum of 60% available chlorine in its anhydrous form (CAS 2893-78-9). Professional buyers specify SDIC 60 when chlorine delivery per shipped kilogram matters — long-haul container freight, municipal disinfection budgets, and humanitarian procurement all reward the extra strength this grade delivers. The product dissolves quickly in water, carries built-in cyanuric acid stabilization that protects chlorine from rapid UV degradation, and sits at a near-neutral pH of 5.5-7.0 in a 1% solution, which simplifies pH correction after dosing. Everglory Industrial manufactures and exports SDIC 60 as granular (8-30 mesh and 20-40 mesh) and tablets to ISO 9001 standards, shipping in UN 2465 certified plastic drums to buyers in 60+ countries.

SDIC 60 Grade Specifications

Every production batch of SDIC 60 is tested against the specification below before release, and a Certificate of Analysis accompanies each shipment:

SDIC 60 vs SDIC 56: Which Grade to Choose

Sodium dichloroisocyanurate is sold commercially in two grades: SDIC 60, the anhydrous form (CAS 2893-78-9), and SDIC 56, the dihydrate form (CAS 51580-86-0). The chemical difference is crystal water — the dihydrate carries two water molecules per unit, which dilutes its available chlorine to 56%. The table below summarizes the practical consequences for buyers:

The guidance is straightforward: when freight distance is long, when tenders specify minimum available chlorine of 60%, or when program budgets are calculated per unit of chlorine delivered, SDIC 60 is the correct specification. Buyers serving price-sensitive local pool retail may find SDIC 56 adequate for shorter supply chains.

Why Specify SDIC 60

• Most chlorine per kilogram of any SDIC grade: at 60% minimum available chlorine, the anhydrous form delivers the strongest chlorine payload sodium dichloroisocyanurate can offer — no higher commercial grade exists
• Lower shipping cost per unit chlorine: roughly 7% more active chlorine in every container compared with the dihydrate grade directly reduces landed cost per kilogram of chlorine at destination
• Fast dissolution retained: granular SDIC 60 dissolves rapidly in water, making it suitable for both direct dosing and solution preparation without lengthy mixing times
• Near-neutral solution pH: the 5.5-7.0 range of a 1% solution minimizes pH drift in treated water, reducing corrective chemical consumption in pools and distribution networks
• Consistent anhydrous quality: produced under ISO 9001 control, every batch meets the same 60% minimum specification, giving procurement teams a stable basis for tender compliance

SDIC 60 Dosing Guidelines

The following table provides general dosing reference points for SDIC 60 across common applications. Always verify residual chlorine with a test kit and adjust to local regulatory requirements:

Applications of SDIC 60

• Municipal drinking water programs: utilities and water boards specify SDIC 60 for its high chlorine payload and stabilized release profile, which maintains residuals across long distribution networks
• Pool and spa chains: multi-site operators standardize on one high-strength grade for granular dosing and tablet feeders, simplifying inventory and training across every facility
• Humanitarian water treatment (NGOs): relief organizations value the compact strength of SDIC 60 — more treated water per drum flown or trucked into crisis zones, with cyanurate stabilization suited to open storage conditions
• Hospital and public facility disinfection: fast-dissolving granular is prepared into solution for surface and equipment sanitation where near-neutral pH protects fixtures and flooring
• Aquaculture: fish and shrimp operations use measured doses for pond and hatchery water hygiene, dechlorinating before introducing stock

Procurement Checklist for SDIC 60

Before confirming any SDIC 60 order, professional buyers should verify the following six points with their supplier:

• Request a batch COA: confirm available chlorine at 60% minimum and moisture at 4% maximum with a dated Certificate of Analysis for the exact production batch being shipped
• Verify anhydrous versus dihydrate: confirm CAS 2893-78-9 and the anhydrous form in writing — the dihydrate grade cannot meet the 60% specification
• Confirm the available chlorine titration method: agree with your laboratory on the test method (typically iodometric titration) so incoming inspection results match the supplier COA
• Check UN drum certification: verify UN 2465 certification marks on the plastic drums and compatibility with IMDG maritime transport requirements
• Review export documentation: confirm the supplier provides MSDS, COA, Certificate of Origin, commercial invoice, packing list, and dangerous goods declaration for your destination
• Arrange third-party inspection: for large contracts, appoint SGS, Bureau Veritas, or similar to witness sampling and testing before vessel loading

Packaging and Storage

All SDIC 60 shipments from Everglory Industrial are packed in UN 2465 certified plastic drums with inner liners, compliant with IMDG code requirements for maritime transport:

Store SDIC 60 in the original sealed drum in a cool, dry, well-ventilated area away from direct sunlight and heat. Keep strictly separate from acids, ammonia-containing products, and calcium hypochlorite — contact between these materials can trigger dangerous reactions. Reseal drums tightly after each use. Under proper storage, shelf life is 24 months from production date.

Frequently Asked Questions