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Lab Chemical-60

Educational Use Only - Order On Request

ISO-PROPYL ALCOHOL LR IPA

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Product Code: RXSOL-60-6604-756

Product Short Description

ISO-PROPYL ALCOHOL LR IPA

Remarks

Other Valuable Solvent 

Grade

Packing

HS Code

Application

Toluene

Industrial

       200 L drum

   29023000

      Paint, Adhesive, Pharma

Acetone

Industrial

      160 / 200 L drum

   29141100

     Pharma, Paint, Cleaning

Methanol

Industrial

      200 L drum.           

   29051100

     Chemical Synthesis, Fuel

IPA (Iso Propyl Alcohol)

Industrial

      200 L drum

   29051220

     Pharma, Cleaning Agent

Ethyl Acetate

Industrial

     200 L drum

   29153100

     Coatings, Adhesives

Other Equivalent Brand

ISO-PROPYL ALCOHOL LR IPA

Free Delivery / Supply Locations

Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...

Educational Use Only - Order On Request

ISO-PROPYL ALCOHOL IPA

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Product Code: RXSOL-60-6604-754

Product Short Description

ISO-PROPYL ALCOHOL AR IPA

Other Equivalent Brand

ISO-PROPYL ALCOHOL AR IPA

Free Delivery / Supply Locations

Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...

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ISO-PROPYL ALCOHOL HPLC SPECTROSCOPY

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Product Code: RXSOL-60-6604-755

Product Short Description

ISO-PROPYL ALCOHOL HPLC SPECTROSCOPY

Other Equivalent Brand

ISO-PROPYL ALCOHOL HPLC SPECTROSCOPY

Free Delivery / Supply Locations

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KOVACS INDOLE REAGENT

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Product Code: RXSOL-60-6604-772

Product Short Description

KOVACS INDOLE REAGENT

Other Equivalent Brand

KOVACS INDOLE REAGENT

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KINETIN PURISS CHR

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Product Code: RXSOL-60-6604-771

Product Short Description

KINETIN PURISS CHR

Other Equivalent Brand

KINETIN PURISS CHR

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ITACONIC ACID

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Product Code: RXSOL-60-6604-760

Product Short Description

ITACONIC ACID

Other Equivalent Brand

ITACONIC ACID

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ISO PROPYL b D 1 THIOGALACTOPYRANOSIDE IPTG

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Product Code: RXSOL-60-6604-759

Product Short Description

ISO PROPYL b D 1 THIOGALACTOPYRANOSIDE IPTG

Other Equivalent Brand

ISO PROPYL b D 1 THIOGALACTOPYRANOSIDE IPTG

Free Delivery / Supply Locations

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JSB STAIN SOLUTION NO 1

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Product Code: RXSOL-60-6604-761

Product Short Description

JSB STAIN SOLUTION NO 1

Free Delivery / Supply Locations

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KIESELGUHR purified white

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Product Code: RXSOL-60-6604-770

Product Short Description

KIESELGUHR purified white

Other Equivalent Brand

KIESELGUHR purified white

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KARL FISCHER REAGENT Pyridine Free

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Product Code: RXSOL-60-6604-769

Product Short Description

KARL FISCHER REAGENT Pyridine Free

Remarks

Karl Fischer titration is simply a method for quantifying water content of samples. The fundamental principle behind this reaction is based on the Bunsen reaction between compounds such as iodine, sulphur dioxide to form sulphuric acid and hydrogen iodide. Karl Fischer initiated a new method based on Bunsen’s reaction. He discovered that the reaction could be modified for determining water in a non-aqueous system containing an excess of sulphur dioxide in the presence of a suitable base. He used a primary alcohol (methanol) as the solvent and a base (pyridine) as the buffering agent.
 
What is the Karl Fischer Reaction?
(1) CH3OH + SO2 + RN [RNH]SO3CH3
 
Reaction-1:  is where the alcohol reacts with sulphur dioxide (SO2) and base to form an intermediate alkylsulfite salt
 
(2) H2O + I2 + [RNH]SO3CH3 + 2RN [RNH]SO4CH3 + 2[RNH]I
 
Reaction-2: is the oxidation step where the intermediate is then oxidised to an alkylsulphate salt. This reaction consumes water.

Water and iodine are consumed in a 1:1 ratio. Once all of the water present is consumed, the presence of excess iodine is detected by the indicator electrode. That signals the end-point of the titration. The amount of water present in the sample is calculated based on the concentration of iodine in the Karl Fisher titrating reagent and the amount of Karl Fisher Reagent consumed in the titration. Depending on the type of base used the rate of reaction will vary. Classic Karl Fischer reagents contained pyridine, a noxious carcinogen, as the base. Due to its weak basicity the reaction is slow and the end point is not stable. The most common base used today is imidazole where greatest accuracy and repeatability can be achieved. Coulometry is an absolute technique so standardisation of Karl Fischer reagents is not necessary.
 
 
Coulometric Titration Method
In coulometric Karl Fischer, iodine is generated electrochemically in situ during the titration.
The anolyte contains iodide, sulphur dioxide, bases and solvents such as methanol. Electrolytic oxidation occurs when a sample is added to this anolyte.
Iodine is generated at the anode of the titration cell as shown in formula (3)
(3) 2I--2e ---> I2
Stoichiometrically, 1 mole of water will react with 1 mole of iodine, so that 1 milligram of water is equivalent to 10⋅71 coulombs of electricity

Other Equivalent Brand

KARL FISCHER REAGENT Pyridine Free

Free Delivery / Supply Locations

Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...