The purchasing name matches but delivered specifications differ
Specify hydration form, available chlorine and method in the order.
Anhydrous salt and dihydrate are distinct purchasing identities.
Open technical diagram · PubChem CID 517202 · PubChem CID 23667638
Chlorine and chlorine dioxide / Chemical
Sodium Dichloroisocyanurate
Sodium dichloroisocyanurate · SDIC / NaDCC
For pool and portable drinking-water disinfection products with defined uses. Distinguish anhydrous and dihydrate forms, and select specifications according to the application, dosage form and documentation requirements.
Product uses
A stabilized-chlorine disinfectant product or formulation raw material with defined uses.
Bring an existing model or purchasing specification directly into the discussion.
Purchasing informationView parameter guidance ↓
- Chemical identity / CAS
- 2893-78-9Sodium dichloroisocyanurate, anhydrous ↗51580-86-0Sodium dichloroisocyanurate dihydrate ↗
- Physical form / Type
- The anhydrous form is a white solid; powder, granules or formed dihydrate products must match actual supply.
- Key purchasing comparisons
- Anhydrous or dihydrate formFinal-use labelProduct dosage form and packaging integrityAvailable chlorine and cyanuric acid requirements
- Packaging and delivery
- First confirm hydration state, then bag or drum options, moisture-resistant liners and turnover after opening; packaging must clearly identify anhydrous or dihydrate form.
Identity and physical form identify the product; specific concentration, grade, packaging and uses are governed by mutually confirmed formulated-product documents.
01 / Product and applications
Uses and product form
Chemical identity / Technical type
The sodium salt of dichloroisocyanuric acid; contracts and COAs should specify anhydrous or dihydrate form.
Appearance and delivery form
Raw-material and product granules, powders or tablets must match actual supply; the SDIC name does not establish tablet weight or fast-dissolution performance.
Identity note
SDIC/NaDCC has distinct anhydrous and dihydrate identities. Their CAS identifiers denote different hydration states; purchasing names, SDS, COA and analytical calculation bases must agree. They are not interchangeable identifiers for one batch.
02 / Specification selection
Key purchasing parameters
| Items to confirm | Relevance to purchasing and use |
|---|---|
| Anhydrous or dihydrate form | Affects specification comparison and active-content acceptance. |
| Final-use label | Verify drinking-water and pool products separately. |
| Product dosage form and packaging integrity | Determines portable use, storage and shelf-life management. |
| Available chlorine and cyanuric acid requirements | Connect composition parameters with final-water management. |
Include parameters, test methods and acceptance checkpoints in purchasing requirements to compare specifications.
03 / Applications and limits
Applications and conditions of use
These are starting points for conditional verification. Specific product suitability still requires joint confirmation through product documents, operating conditions and destination requirements.
Additional checks before use
- Raw-material purity or antimicrobial action does not establish drinking-water suitability.
- Stabilized chlorine is not automatically suitable for hot tubs.
- Cannot treat fuel, toxic chemical or radioactive contamination.
04 / Common challenges
Common issues and responses
Treating pool tablets as emergency drinking-water tablets
Check formulated-product drinking-water uses, expiry and instructions.
Remote water supply lacks testing
Establish pretreatment, metering and post-treatment testing together.
05 / Documents and evidence
Documents and downloads
TDS / SDS / COARequest by specific model, use and batchProduct purchasing checklistDownload directly and add existing specifications and operating conditions
View public technical references
These documents support technical categories and use limits, not ENVO certifications or customer cases. Verification date: 2026-10-26.
06 / Frequently asked questions
Purchasing FAQs
Are NaDCC and SDIC different products?
They are usually abbreviations for the same active ingredient; hydration form and product instructions still require verification.
Can industrial grade serve as drinking-water grade?
The generic name is insufficient; corresponding drinking-water uses and impurity documents are required.
Why cannot one universal dose be provided?
Product strength, water quality and target microorganisms differ; use labels and validated procedures to determine dosing.
Related selection options
Compare related products further.
Related products are not necessarily direct substitutes; verify each intended use.
Molecular structureChlorine and chlorine dioxide · Chemical
Trichloroisocyanuric Acid
TCCA
For pool disinfection products with defined uses. Select specifications according to available chlorine, dosage form and dosing equipment, while considering cyanuric acid management and operating costs.
Sample photographChlorine and chlorine dioxide · Chemical
Calcium Hypochlorite
Ca(ClO)₂
For pool, water-supply and effluent disinfection where the corresponding use applies. Purchasing priorities are available chlorine, particle size and insolubles, together with calcium loading in the water and dosing equipment.
Sample photographChlorine and chlorine dioxide · Chemical
Sodium Hypochlorite
NaClO
A chlorination chemical used with liquid metering systems and residual monitoring. Purchasing priorities are available chlorine at delivery, storage turnover and impurity requirements for the intended use.
Related technical articles
Identity and specifications
SDIC content on arrival differs from the quotation: how should anhydrous and dihydrate forms be reconciled?
Dichlor is not a sufficiently precise purchasing name. Resolve content disputes by first confirming hydration form, test parameter and pricing basis, then determine whether a true quality deviation exists.
Read and verify →
Purchasing and delivery
Purchasing SDIC emergency drinking-water tablets: why check packaging units before total carton weight?
Portable drinking-water tablets treat specific containers and volumes. Packaging that lets users accurately identify each treatment requirement is more relevant to the purchasing objective than kilograms per carton.
Read and verify →
Trials and acceptance
Both SDIC samples show chlorine residual: how can actual batch differences be determined?
One residual result answers a question at one time. Compare SDIC samples using consistent water samples, identities and test conditions, observing chemical-delivery behavior and post-treatment parameters separately; do not turn unlike trials into a product ranking.
Read and verify →ENVO · Purchasing and application support
Discuss your specific sodium dichloroisocyanurate requirements.
Start with a product name, current model, water-quality report or destination documentation requirements.