18899-24-6

Basic information

• Product Name: (5E)-octadec-5-ene
• Synonyms: (5E)-5-Octadecene; 5-octadecene; 5-octadecene, (5E)-; 5-Octadecene, (E)-
• CAS NO: 18899-24-6
• Molecular Formula: C₁₈H₃₆
• Molecular Weight: 252.48
• Mol File: 18899-24-6.mol

Chemical Properties

• Refractive Index: 1.448
• CAS DataBase Reference: (5E)-octadec-5-ene(CAS DataBase Reference)
• NIST Chemistry Reference: (5E)-octadec-5-ene(18899-24-6)
• EPA Substance Registry System: (5E)-octadec-5-ene(18899-24-6)

Safety Data

• Hazardous Substances Data: 18899-24-6(Hazardous Substances Data)

Upstream product

• 112-92-5 1-octadecanol 
• 112-88-9 octadec-1-ene 
• 71899-42-8 octadec-5-yne 

Relevant articles and documents

CATALYSTS AND CATALYTIC PROCESSES

A process for migrating C=C double bonds within an unsaturated organic compound is described. The process involves contacting an unsaturated organic compound starting material with a heteropoly acid catalyst in the presence of light having a wavelength of less than or equal to 700 nm. Also described is a process for the preparation of novel heteropoly acids having markedly increased surface area.

FOAMING COMPOSITION CONTAINING INTERNAL OLEFIN SULFONATES AND ONE FOAM-ENHANCING AGENT OR FOAM BOOSTER

The present invention relates to a composition containing in an aqueous medium, at least 1) a sulfonate mixture containing: a) an internal olefin sulfonate (A) having 16 carbon atoms and b) an internal olefin sulfonate (B) having 18 carbon atoms, - wherein the weight ratio (A/B) of the component (A) to the component (B) present in the sulfonate mixture is from 75/25 to 90/10, preferably from 80/20 to 85/15, and - wherein the weight ratio of the hydroxy form compounds present in the internal olefin sulfonates (A) and (B) to the olefin form compounds present in the internal olefin sulfonates (A) and (B) is from 75/25 to 100/0, preferably from 80/20 to 95/5; and 2) at least one foam-enhancing agent or foam booster. The present invention relates also to a process for cleansing keratin materials, which consists of applying to the said keratin materials a composition according to the invention, in working the said composition into a foam and then rinsing off the said composition, especially with water. The present invention relates also to the cosmetic use of the composition as defined above, for removing makeup and/or cleansing the skin, the hair and/or mucous membranes, or for skincare.

CLEANSING COMPOSITION FOR SKIN OR HAIR

Provided is a cleansing composition for skin or hair capable of bringing about a good rinse feel and, in regard to hair, imparting softness to hair during rinsing and after towel drying, and further, imparting a sufficient moist feeling also to skin after application. A cleansing composition for skin or hair, comprising the following (A) and (B): (A) an internal olefin sulfonate having 12 or more and 24 or less carbon atoms; and(B) a cationic polymer or an amphoteric polymer.

INTERNAL OLEFINIC SULFONATE COMPOSITION AND CLEANSING COMPOSITION CONTAINING THE SAME

Provided is an internal olefin sulfonate composition which is capable of exerting good foamability at the same time with foam quality, foam dissipation property, and less irritation to the skin at high levels, and a cleansing composition containing the same. The internal olefin sulfonate composition of the present invention comprises (A) an internal olefin sulfonate having 16 carbon atoms and (B) an internal olefin sulfonate having 18 carbon atoms, wherein a mass content ratio (A/B) of component (A) to component (B) is from 75/25 to 90/10.

CLEANSING COMPOSITION FOR SKIN OR HAIR

There is provided a cleansing composition for skin or hair which can provide a good rinse feel, enhance combing property of the hair during rinsing to impart softness to the hair, and impart a refreshing feeling upon application to the skin without causing stickiness. A cleansing composition for skin or hair contains the following (A) and (B): (A) an internal olefin sulfonate having 12 or more and 24 or less carbon atoms; and(B) an anionic surfactant having no sulfate group except the internal olefin sulfonate (A) and an anionic surfactant having two or more carboxylic acid groups.

AQUEOUS HAIR CLEANSING AGENT

The invention relates to an aqueous hair cleansing agent comprising the following components (A), (B), (C), and water and having a pH of 2 to 5 at 25° C. when diluted 20-fold by mass with water: (A) an internal olefin sulfonate, (B) an organic solvent selected from the group consisting of the following (B1) to (B5): (B1) an aromatic alcohol,(B2) a polypropylene glycol,(B3) a N-alkyl pyrrolidone,(B4) an alkylene carbonate,(B5) a lactone or a cyclic ketone, and (C) an organic carboxylic acid selected from the group consisting of a hydroxymonocarboxylic acid and dicarboxylic acid.

CLEANSING COMPOSITION FOR SKIN OR HAIR

The present invention provides a cleansing composition for skin or hair which can provide a good rinse feel, give good combability and softness from rinsing to drying when the cleansing composition is applied to hair, and give good moist feeling to skin when the cleansing composition is applied to skin. The cleansing composition for skin or hair is a cleansing composition comprising an internal olefin sulfonate (A) having 12 or more and 24 or less carbon atoms.

SKIN CLEANSING COMPOSITION

The present invention provides a skin cleansing composition comprising the following components (A), (B), and (C): (A) (a1) an alkenylsulfonic acid having 12 to 22 carbon atoms or its salt, (a2) an alkylsulfonic acid having 12 to 22 carbon atoms or its salt, or a mixture of them,(B) an alkyl ether carboxylic acid represented by the following formula (1) or its salt: [in-line-formulae]R1—O—(CH2CH2O)n—CH2—COOX??(1)[/in-line-formulae] wherein R1 represents an alkyl group having 4 to 22 carbon atoms, n denotes a number from 0 to 20, X represents a hydrogen atom, an alkali metal, an alkali earth metal, ammonium, or organic ammonium, and n denotes a number of 0.5 or more and less than 4 on average; and (C) water.

CLEANSING COMPOSITION FOR SKIN OR HAIR

Provided is a cleansing composition for skin or hair which can provide a good rinse feel and can enhance the combing property of hair after rinsing and the manageability after drying in application to the hair and can impart a sufficient moist feeling to skin in application to the skin. A cleansing composition for skin or hair, comprising the following (A) and (B): (A) an internal olefin sulfonate having 12 or more and 24 or less carbon atoms; and(B) an oil solution having a solubility of from 0 to 1 g in 100 g of water at 20° C.

Practical Procedures for the Preparation of N-tert-Butyldimethylsilylhydrazones and Their Use in Modified Wolff-Kishner Reductions and in the Synthesis of Vinyl Halides and gem-Dihalides

In this work we develop practical chemistry for the preparation of N-tert-butyldimethylsilylhydrazone (TBSH) derivatives from carbonyl-containing compounds and show that these products serve as superior alternatives to simple hydrazones in Wolff-Kishner-type reduction reactions, in the Barton vinyl iodide preparation, in the synthesis of vinyl bromides, and in the synthesis of gem-diiodides, gem-dibromides, and gem-dichlorides. In our new procedure for silyl hydrazone synthesis, aliphatic and aromatic ketones and aldehydes are shown to undergo highly efficient coupling (typically >95% yield) to form the corresponding TBSH derivatives when combined with equimolar amounts of 1,2-bis(tert-butyldimethylsilyl)-hydrazine (BTBSH) and a catalytic quantity of scandium trifluoromethanesulfonate (typically, 0.01 mol %), neat, or in solvent. Optimized procedures are provided for the use of TBSH derivatives in a Wolff-Kishner-type reduction protocol that proceeds at low temperature (23-100 °C) and in a single reaction flask. Similarly, protocols for the use of TBSH derivatives as precursors to vinyl halides and gem-dihalides are described in detail.