The abbreviation matches but SDS components differ
Compare full names, chain lengths and analytical bases.
Two decyl chains and two methyl groups on a quaternary ammonium ion, with chloride counterion.
Open technical diagram · PubChem CID 23558
Non-oxidizing biocides / Chemical
Didecyldimethylammonium chloride
Didecyldimethylammonium chloride · DDAC
A double-chain quaternary ammonium approach for screening industrial water formulations with defined uses. Confirm whether the product contains the didecyl compound alone, mixed double-chain quaternary ammonium compounds or a blend; the abbreviation DDAC alone is insufficient for acceptance.
Product uses
A non-oxidizing cationic ingredient in industrial-water products.
Bring an existing model or purchasing specification directly into the discussion.
Purchasing informationView parameter guidance ↓
- Chemical identity / CAS
- 7173-51-5Didecyldimethylammonium chloride; two decyl chains ↗
- Physical form / Type
- Supply is commonly discussed as a formulation; specific solution, solvent and appearance must match documents.
- Key purchasing comparisons
- Chain lengths and exact compositionActive content and solventAnionic components, foam and fluid performance
- Packaging and delivery
- Confirm the single didecyl identity or chain-length mixture, and verify solvent-compatible containers, closed withdrawal and delivery documents.
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
This page refers to didecyldimethylammonium chloride; commercial double-chain quaternary ammonium products may contain other chain lengths, which must be clarified.
Appearance and delivery form
Confirm the specific solution, solvent and appearance for the supplied product.
Identity note
This CAS identifies didecyldimethylammonium chloride, DDAC with two C10 chains. Commercial double-chain quaternary ammonium products may be mixed-chain products; the common abbreviation DDAC alone does not establish identical identity.
02 / Specification selection
Key purchasing parameters
| Items to confirm | Relevance to purchasing and use |
|---|---|
| Chain lengths and exact composition | Prevent abbreviations from concealing different chemical specifications. |
| Active content and solvent | Determines acceptance and storage conditions. |
| Anionic components, foam and fluid performance | Requires validation with actual water quality. |
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
- A blend's industrial use does not automatically apply to any DDAC raw material.
- Surface-disinfection reports cannot replace industrial-water evidence.
- Not for unvalidated drinking-water or live-aquaculture applications.
04 / Common challenges
Common issues and responses
Circulation foam increases after addition
Check surface activity and existing additives.
Oilfield-water suitability lacks field evidence
Use actual fluids to check efficacy, viscosity and phase separation.
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.
ArxadaChemical types and condition differences between ADBAC and DDACStepanQuaternary ammonium product approaches for industrial and oilfield waterStepanExample industrial-water quaternary ammonium product label (historical version; verify the current label)LANXESSBiocide product documentation for oil and gas water treatment
06 / Frequently asked questions
Purchasing FAQs
Are all double-chain quaternary ammonium compounds called DDAC?
Commercial abbreviations may lack precision; read the complete composition.
Does hard-water tolerance mean efficacy under all conditions?
No. Review the specific formulation and trial conditions.
Can it directly replace BAC?
First compare chemical identity, efficacy and system compatibility.
Related selection options
Compare related products further.
Related products are not necessarily direct substitutes; verify each intended use.
Representative homologueNon-oxidizing biocides · Chemical
Benzalkonium chlorides
BKC / BAC
Quaternary ammonium active ingredients. Industrial water selection must identify the relevant alkyl chain distribution and complete formulated product. Documentation for surface disinfection, industrial water biocidal treatment and pool algae control is not interchangeable.
Functional groupAlgaecides · Specialized formulation
Polymeric quaternary ammonium compounds
Polyquat
A polymeric quaternary ammonium category found in dedicated pool algaecides and industrial blends. Polyquat does not identify a single chemical; verify the specific polymer, intended use and compatibility with the primary disinfection system.
Example activeSpecialized formulations · Specialized formulation
Biocide formulations for oilfield water
Oilfield formulations
Select for a specific treatment stage: produced water, reinjection, fracturing or surface water storage. Efficacy, corrosion and fluid compatibility require validation under the same actual operating conditions; one test cannot represent an entire oilfield.
Related technical articles
Limits of use
A DDAC label lists oilfield water: does that cover offshore fields, fracturing fluids and reinjection water?
Oilfield is an industry, not a single use scenario. Verify DDAC formulated-product uses for the specific system and environment, paying particular attention to label exclusions.
Read and verify →
Quantity checks
DDAC is quoted by tonne and metered by liter: how can purchasing and dosing records be reconciled?
Mass, volume and active quantity are different bases. DDAC purchasing and site discussions should begin with actual product density, temperature conditions and content definitions, rather than carrying over conversions from another product.
Didecyldimethylammonium chlorideRecirculating Cooling Water & Heat ExchangersSelection and purchasing
Read and verify →
Supplier changes
Changing DDAC suppliers: which delivery differences are missed by testing active content alone?
Total active content is important but does not represent a complete DDAC product. Supplier changes require checks of carrier, physical properties, packaging and actual-use documents, particularly when the existing system's procedures were built around the former product.
Didecyldimethylammonium chlorideRecirculating Cooling Water & Heat ExchangersSelection and purchasing
Read and verify →ENVO · Purchasing and application support
Discuss your specific DDAC requirements.
Start with a product name, current model, water-quality report or destination documentation requirements.