Dioctadecyl dimethyl ammonium chloride

Product Details

CasNo： 107-64-2

MF： C38H80ClN

Appearance： liquid

Delivery Time： 15 days

Packing： 200kg/drum

Purity： 99%

1. Basic Information

• Chinese Name: 双氢化牛脂基二甲基氯化铵
• English Name: Di (Hydrogenated Tallow) Dimethyl Ammonium Chloride; Distearyl Dimethyl Ammonium Chloride (DSDMAC, when dominated by C18 chains)
• CAS Number: 107-64-2
• Molecular Formula: C38​H80​ClN (average structure, based on C18 hydrogenated tallow chains; actual chain length may range from C16 to C18)
• Molecular Weight: 586.5 g/mol (average, depending on fatty chain distribution)
• Chemical Structure: A quaternary ammonium cation with two hydrophobic hydrogenated tallow chains (long alkyl chains) and two hydrophilic dimethyl groups, paired with a chloride anion.
• Common Synonyms: DHTDMAC; DSDMAC; Dimethyl di(hydrogenated tallow) ammonium chloride; Hydrogenated tallow dimethyl ammonium chloride

2. Physical and Chemical Properties

3. Key Performance Characteristics

1. Superior Softening & Antistatic Effects
   The two long hydrogenated tallow chains form a hydrophobic film on surfaces (e.g., textile fibers, hair cuticles), reducing friction between fibers/hair strands—delivering a "silky-soft" 手感 (hand feel) superior to single-chain quaternary ammonium salts (e.g., benzalkonium chloride). It also neutralizes static charge, preventing fabric/hair from clinging to skin or attracting dust, with antistatic effects lasting through 20+ washes for textiles.
2. Strong Adsorption & Long-Lasting Efficacy
   Its cationic charge enables tight binding to negatively charged surfaces (e.g., cotton, polyester, hair), ensuring the softening/antistatic film does not easily wash off. In textiles, this provides durable softness even after repeated laundering; in hair care, it maintains smoothness throughout the day without reapplication.
3. Mild Antimicrobial & Emulsifying Properties
   Exhibits broad-spectrum antimicrobial activity against Gram-positive bacteria (e.g., Staphylococcus aureus) and fungi (e.g., Aspergillus niger) at concentrations ≥0.5%, making it suitable for preservative-free or low-preservative formulations. As an emulsifier, it stabilizes oil-in-water (O/W) or water-in-oil (W/O) emulsions (e.g., asphalt, silicone oil), preventing phase separation for 6+ months.
4. Excellent Compatibility (with Cationics/Non-Ionics)
   Compatible with cationic surfactants (e.g., Polyquaternium-10) and non-ionic surfactants (e.g., polysorbate 60), but reacts with anionic surfactants (e.g., SLES, sodium lauryl sulfate) to form insoluble precipitates—requiring sequential addition or separate formulation phases.

4. Application Fields

1. Textile Industry (Core Scenario)

• Fabric Softeners: Added to laundry rinse cycles (0.1%–0.5% active content) or textile finishing baths (1%–3%) for cotton, linen, polyester, and blended fabrics—improving softness, reducing wrinkling, and enhancing wear comfort. Ideal for bed linens, towels, and children’s clothing.
• Antistatic Finishing: Used in synthetic fiber processing (e.g., polyester, nylon) to eliminate static buildup during weaving, dyeing, and wearing—preventing fiber breakage and ensuring smooth fabric production.

2. Personal Care

• Hair Care: Formulated into conditioners, hair masks, and leave-in treatments (0.2%–1.0% active content) to soften hair, reduce frizz, and improve combability. Especially effective for dry, damaged, or chemically treated hair (e.g., permed/colored hair).
• Skin Care: Used in thick creams and body butters (0.1%–0.5%) as an emulsifier and softening agent—enhancing skin smoothness without greasiness.

3. Industrial Applications

• Emulsification: Acts as a primary emulsifier for asphalt emulsions (road construction), silicone oil emulsions (cosmetic additives), and synthetic rubber latex—improving emulsion stability and application performance.
• Oilfield Auxiliaries: Used as a clay stabilizer and demulsifier in oilfield drilling and production—preventing clay swelling in wellbores and aiding oil-water separation in crude oil processing.
• Organoclay Modification: Treats bentonite to form organoclay, which is used as a thickener in paints, inks, and drilling fluids—enhancing viscosity control and suspension stability.
• Disinfection (Specialized Use): Added to industrial disinfectants (0.5%–2% active content) for hard surfaces (e.g., factory floors, equipment) to inhibit microbial growth and reduce odor.

4. Other Fields

• Paper Industry: Used as a sizing agent and softener for tissue paper and toilet paper—improving paper flexibility and reducing linting.
• Agriculture: Applied to agricultural film surfaces (0.3%–0.8%) as an antistatic agent—preventing dust adsorption and ensuring light transmission for crop growth.

5. Safety & Usage Guidelines

• Hazards & Precautions:
  • Skin/Eye Irritation: Concentrated DHTDMAC may cause mild skin dryness or eye redness; wear gloves and goggles during handling. Rinse with plenty of water for 15+ minutes if contact occurs.
  • Incompatibility: Avoid mixing with anionic surfactants to prevent precipitation and efficacy loss.
  • Environmental Impact: Biodegradability is moderate (60%–70% over 28 days per OECD 301B); comply with local discharge regulations to avoid aquatic ecosystem impact.
• Recommended Dosages:
  • Textiles: 0.1%–3.0% (active content, depending on finishing method).
  • Personal Care: 0.1%–1.0% (active content, hair/skin formulations).
  • Industrial: 0.5%–5.0% (active content, emulsification/oilfield applications).

6. Packaging & Storage

1. Packaging Forms

• Industrial Grade (74%–76% active): 50 kg HDPE plastic buckets or 175 kg HDPE drums—sealed with screw caps to prevent moisture absorption and leakage.
• High-Purity Grade (90%+ active): 25 kg aluminum-lined cardboard drums or 200 L HDPE drums—moisture-proof and light-resistant for long-term storage.
• Sample Sizes: 1 L HDPE bottles (liquid/paste) or 100 g aluminum foil bags (solidified wax)—for R&D trials and small-batch testing.

2. Storage Conditions

• Store in a cool, dry, well-ventilated area (temperature: 15–30°C); avoid direct sunlight and extreme temperatures (do not freeze or expose to >80°C).
• If solidification occurs at low temperatures, gently heat to 50–60°C (in a water bath) and stir uniformly before use—do not use open flame heating.
• Shelf Life: Unopened containers—24 months (industrial grade); 36 months (high-purity grade). Use opened packages within 6 months and reseal promptly to prevent moisture absorption.