Dimethyldioctadecylammonium bromide
Dimethyldioctadecylammonium bromide (CAS: 3700-67-2) is a cationic quaternary ammonium compound with the molecular formula [CH3(CH2)17]2N(Br)(CH3)2 and a molecular weight of 630.95. It functions as a detergent and exhibits properties useful in chemical synthesis and as a phase transfer catalyst. This compound is supplied by Tech Serve Solutions with an assay of ≥98.0% (AT).
- IUPAC
- Distearyldimethylammonium bromide
- Synonyms
- Distearyldimethylammonium bromide
![Dimethyldioctadecylammonium bromide ([CH3(CH2)17]2N(Br)(CH3)2) — chemical structure, CAS 3700-67-2; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F3700-67-2.png&w=3840&q=75)
Cationic Detergent
Dimethyldioctadecylammonium bromide acts as a cationic surfactant, making it effective in formulations requiring surface-active properties. Its structure allows for interaction with various surfaces and dispersions.
Chemical Synthesis
This compound serves as a reagent or catalyst in various chemical syntheses. Its quaternary ammonium structure can facilitate specific reaction pathways and improve yields in organic transformations.
Phase Transfer Catalyst
As a phase transfer catalyst, Dimethyldioctadecylammonium bromide can aid in transferring reactants between immiscible phases, thereby enhancing reaction rates and enabling reactions that might otherwise be slow or impossible.
Laboratory Reagent
It is utilised as a reagent in laboratory settings for research and development purposes, particularly in areas involving surfactants, quaternary ammonium compounds, and organic synthesis.
| Molecular weight | 630.95 |
|---|---|
| Linear formula | [CH3(CH2)17]2N(Br)(CH3)2 |
| Assay | ≥98.0% (AT) |
| Melting point | ~160 °C |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Description | cationic |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Dimethyldioctadecylammonium bromide used for?
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Dimethyldioctadecylammonium bromide is primarily used as a cationic detergent, in chemical synthesis, and as a phase transfer catalyst in laboratory research and industrial applications.
What are the CAS number and formula for Dimethyldioctadecylammonium bromide?
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The CAS number is 3700-67-2, and its linear formula is [CH3(CH2)17]2N(Br)(CH3)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Dimethyldioctadecylammonium bromide with an assay of ≥98.0% (AT). We do not represent this product as USP, BP, EP, or pharmaceutical grade unless explicitly stated in the product documentation.
How should Dimethyldioctadecylammonium bromide be handled safely?
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Handle with care to avoid skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Use appropriate personal protective equipment, including a dust mask (type N95), eyeshields, and gloves. Ensure adequate ventilation.
Is Dimethyldioctadecylammonium bromide available for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, and Dimethyldioctadecylammonium bromide can be packed and shipped internationally.
How can I request a quote or sample?
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To request a quote or a sample of Dimethyldioctadecylammonium bromide, please contact our sales team through the website or call us directly.
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