Tuesday 7 November 2017

1,2-Benzisothiazol-3(2H)-one

Listing description

Synonym: BENZISOTHIAZOLINONE (BIT)

CAS NUMBER 2634-33-5

EMPIRICAL FORMULA(HILL NOTATION)C₇H₅NOS

MOLECULAR WEIGHT 151.19

EC NUMBER 220-120-9

MDL NUMBER MFD00127753

PUBCHEM SUBSTANCE ID 24879952

Properties

Related Categories	Building Blocks, C3 to C7, Chemical Synthesis,Heterocyclic Building Blocks, Thiazoles More...
InChI Key	DMSMPAJRVJJAGA-UHFFFAOYSA-N
assay	97%
mp	154-158 °C(lit.)

Description

Packaging

5, 25 g in glass bottle

General description

1,2-Benzisothiazol-3(2H)-one can be synthesized by reacting 2-mercaptobenzoic acid with diphenyl phosphoryl azide.^[1]

Benzisothiazolinone (BIT) is a widely used biocide and belongs to the group of isothiazolinones.

Detailed description

Usage

Benzisothiazolinone has a microbicide and a fungicide mode of action. It is widely used as a preservative, for example in:

· emulsion paints, caulks, varnishes, adhesives, inks, and photographic processing solutions

· home cleaning and car care products; laundry detergents, stain removers and fabric softeners;

· industrial settings, for example in textile spin-finish solutions, leather processing solutions, preservation of fresh animal hides and skins

· agriculture in pesticide formulations

· gas and oil drilling in muds and packer fluids preservation.^[2]^:iv

In paints, it is commonly used alone or as a mixture with methylisothiazolinone. Typical concentrations in products are 200–400 ppmdepending on the application area and the combination with other biocides. According to a study in Switzerland, 19% of the paints, varnishes and coatings contained BIT in 2000. The fraction in adhesives, sealants, plasters and fillers was shown at that time as 25%.^[3]A later study in 2014 shows a dramatic rise in usage, to 95.8% of house paints.

PRICE

$23819.97/KG OR $10827.25/IB

For more information:

mobile: +2348039721941

contact person: emeaba uche

e-mail: emeabau@yahoo.com

website: www.franchiseminerals.com

Sunday 5 November 2017

ACETONE OR PROPANONE [(CH3)2CO]

Listing description

ACS reagent,>99.5%

CAS number 67-64-1

Linear formular CH₃COCH₃

Molecular weight 58.08

Beilstein registry number 635680

EC NUMBER 200-662-2

MDL number MFCD00008765

pubChem substance ID 329751579

eCl@ss 39021201

Related Categories	ACS Grade, ACS Grade Solvents, ACS and Reagent Grade Solvents, Acetone, Amber Glass Bottles, More...
grade	ACS reagent
vapor density	2 (vs air)
vapor pressure	184 mmHg ( 20 °C)
InChI Key	CSCPPACGZOOCGX-UHFFFAOYSA-N
assay	≥99.5%
form	liquid (clear)
shelf life	Recommended retest period - 2 years

Acetone (systematically named propanone) is the organic compound with the formula (CH₃)₂CO.^[12] It is a colorless, volatile, flammable liquid, and is the simplest ketone.

Acetone is miscible with water and serves as an important solvent in its own right, typically for cleaning purposes in the laboratory. About 6.7 million tonnes were produced worldwide in 2010, mainly for use as a solvent and production of methyl methacrylate and bisphenol A.^[13]^[14] It is a common building block in organic chemistry. Familiar household uses of acetone are as the active ingredient in nail polish remover, and as paint thinner.

Detailed description

Acetone is produced and disposed of in the human body through normal metabolic processes. It is normally present in blood and urine. People with diabetes produce it in larger amounts. Reproductive toxicity tests show that it has low potential to cause reproductive problems. Pregnant women, nursing mothers and children have higher levels of acetone.^[15] Ketogenic diets that increase acetone in the body are used to counter epileptic attacks in infants and children who suffer from recalcitrant refractory epilepsy.

Uses[edit]

About a third of the world's acetone is used as a solvent, and a quarter is consumed as acetone cyanohydrin, a precursor to methyl methacrylate.^[13]

Solvent[edit]

Acetone is a good solvent for many plastics and some synthetic fibers. It is used for thinning polyester resin, cleaning tools used with it, and dissolving two-part epoxies and superglue before they harden. It is used as one of the volatile components of some paints and varnishes. As a heavy-duty degreaser, it is useful in the preparation of metal prior to painting. It is also useful for high reliability soldering applications to remove rosin flux after soldering is complete; this helps to prevent the rusty bolt effect.

Acetone is used as a solvent by the pharmaceutical industry and as a denaturant in denatured alcohol. Acetone is also present as an excipient in some pharmaceutical drugs.

Although itself flammable, acetone is used extensively as a solvent for the safe transportation and storage of acetylene, which cannot be safely pressurized as a pure compound. Vessels containing a porous material are first filled with acetone followed by acetylene, which dissolves into the acetone. One liter of acetone can dissolve around 250 liters of acetylene at a pressure of 10 bar.

Chemical intermediate

Acetone is used to synthesize methyl methacrylate. It begins with the initial conversion of acetone to acetone cyanohydrin:

(CH₃)₂CO + HCN → (CH₃)₂C(OH)CN

In a subsequent step, the nitrile is hydrolyzed to the unsaturated amide, which is esterified:

(CH₃)₂C(OH)CN + CH₃OH → CH₂=(CH₃)CCO₂CH₃ + NH₃

The third major use of acetone (about 20%)^[13] is synthesizing bisphenol A. Bisphenol A is a component of many polymers such as polycarbonates, polyurethanes, and epoxy resins. The synthesis involves the condensation of acetone with phenol:

(CH₃)₂CO + 2 C₆H₅OH → (CH₃)₂C(C₆H₄OH)₂ + H₂O

Many millions of kilograms of acetone are consumed in the production of the solvents methyl isobutyl alcohol and methyl isobutyl ketone. These products arise via an initial aldol condensation to give diacetone alcohol.^[14]

2 (CH₃)₂CO → (CH₃)₂C(OH)CH₂C(O)CH₃

Laboratory

In the laboratory, acetone is used as a polar, aprotic solvent in a variety of organic reactions, such as S_N2 reactions. The use of acetone solvent is critical for the Jones oxidation. It does not form an azeotrope with water (see azeotrope (data)).^[38] It is a common solvent for rinsing laboratory glassware because of its low cost and volatility. Despite its common use as a supposed drying agent, it is not effective except by bulk displacement and dilution. Acetone can be cooled with dry ice to −78 °C without freezing; acetone/dry ice baths are commonly used to conduct reactions at low temperatures. Acetone is fluorescent under ultraviolet light, and its vapor can be used as a fluorescent tracer in fluid flow experiments.^[39]

Medical and cosmetic uses

Acetone is used in a variety of general medical and cosmetic applications and is also listed as a component in food additives and food packaging and also in nail polish remover. Dermatologists use acetone with alcohol for acne treatments to peel dry skin.

Acetone is commonly used in chemical peeling. Common agents used today for chemical peels are salicylic acid, glycolic acid, 30% salicylic acid in ethanol, and trichloroacetic acid (TCA). Prior to chemexfoliation, the skin is cleaned and excess fat removed in a process called defatting. Acetone, Septisol, or a combination of these agents is commonly used in this process.

Domestic and other niche uses

Acetone is often the primary component in cleaning agents such as nail polish remover. Acetone is a component of superglue remover and easily removes residues from glass and porcelain. Make-up artists use acetone to remove skin adhesive from the netting of wigs and moustaches by immersing the item in an acetone bath, then removing the softened glue residue with a stiff brush.

Acetone is often used for vapor polishing of printing artifacts on 3D-printed models printed with ABS plastic. The technique, called acetone vapor bath smoothing, involves placing the printed part in a sealed chamber containing a small amount of acetone, and heating to around 80 degrees Celsius for 10 minutes. This creates a vapor of acetone in the container. The acetone condenses evenly all over the part, causing the surface to soften and liquefy. Surface tension then smooths the semi-liquid plastic. When the part is removed from the chamber, the acetone component evaporates leaving a glassy-smooth part free of striation, patterning, and visible layer edges, common features in untreated 3D printed parts.

Low-grade acetone is also commonly used in academic laboratory settings as a glassware rinsing agent for removing residue and solids before a final wash.

PRICE

$255.75/KG OR $116.25/IB

For more information:

mobile: +2348039721941

contact person: emeaba uche

e-mail: emeabau@yahoo.com

website: www.franchiseminerals.com

ALUMINIUM OXIDE[Al2O3]

Listing description

Puriss.,.98% Al₂O₃ basis

Synonym: Alumina

CAS Number 1344-28-1

Linear formular Al₂O₃

Molecular weight 101.96

EC Number 215-691-6

MDL number MFCD00003424

pubChem substance ID 329749286

eCl@ss 38120402