52367

Hexadecyltrimethylammonium bromide

suitable for ion pair chromatography, LiChropur^™

• Synonym(s): CTAB, Cetrimonium bromide, Cetyltrimethylammonium bromide, Palmityltrimethylammonium bromide
• Linear Formula: CH₃(CH₂)₁₅N(Br)(CH₃)₃
• CAS Number: 57-09-0
• Molecular Weight: 364.45
• UNSPSC Code: 23151817
• NACRES: NB.21
• PubChem Substance ID: 329757827
• EC Number: 200-311-3
• Beilstein/REAXYS Number: 3598189
• MDL number: MFCD00011772

Properties

• description: cationic
• Quality Level: 100
• assay: ≥99.0% (AT)
• form: powder or crystals
• quality: LiChropur^™
• mol wt: average mol wt 62,000
• aggregation number: 170
• technique(s): ion pair chromatography: suitable
• CMC: 0.92
• mp: 248-251 °C (lit.)
• solubility: H₂O: soluble 36.4 g/L at 20 °C (completely)
• λ: 10 % in methanol
• UV absorption: λ: 240 nm A_max: 0.04, λ: 250 nm A_max: 0.03, λ: 260 nm A_max: 0.02, λ: 500 nm A_max: 0.02
• HLB: 11
• suitability: corresponds to standard for filter test
• SMILES string: [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C
• InChI: 1S/C19H42N.BrH/c1-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20(2,3)4;/h5-19H2,1-4H3;1H/q+1;/p-1
• InChI key: LZZYPRNAOMGNLH-UHFFFAOYSA-M

Description

General description

Hexadecyltrimethylammonium bromide (CTAB) is a quaternary ammonium salt containing one long hydrophobic alkyl chain called amphiphile. The hydrophobic ions interact forming discrete aggregates possessing a hydrophobic core and a polar surface, called micelles in polar solution.

Application

CTAB was used in preparing buffer solutions prepared during the determination of organic acids in port wine capillary zone electrophoresis using indirect UV detection with 2,6-pyridinedicarboxylic acid.

Other Notes

Additive for ion-pair chromatography; Ion-pair reagent for TLC

Legal Information

LiChropur is a trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• pictograms: GHS08,GHS05,GHS07,GHS09
• signalword: Danger
• hcodes: H302,H315,H318,H335,H373,H410
• pcodes: P273 - P280 - P301 + P312 - P302 + P352 - P305 + P351 + P338 - P314
• Hazard Classifications: Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Irrit. 2 - STOT RE 2 Oral - STOT SE 3
• target_organs: Gastrointestinal tract, Respiratory system
• Storage Class: 11 - Combustible Solids
• wgk: WGK 3
• flash_point_f: 471.2 °F - closed cup
• flash_point_c: 244 °C - closed cup
• ppe: dust mask type N95 (US), Eyeshields, Faceshields, Gloves