Textile Chemical Testing Process

The textile industry is a chemicals based industry. There are different types of chemicals needed in the process of different types of textile processing steps. So chemicals play a vital role in textile industry specially wet processing factory. Major chemicals which widely used in wet processing, their testing are given below.
Testing lab
ACETIC ACID (CH3COOH) TESTING PROCESS
 
Recipe:
  • Caustic soda (NaOH)............................ 4.0% solution
  • Phenolphthalein (C20H14O4) ...............0.1% solution
  • Acetic Acid (CH3COOH) ....................6.0 gm + 94ml Water
Testing Procedure:
  1. Acetic acid (10ml) and Phenolphthalein- As Indicator (3 drops) are taken in a glass flask.
  2. Caustic Soda is kept pouring from burette into the flask drop by drop until the solution color turns into pink.
  3. Burette reading is taken
Calculation:
Burette reading x 10= Purity %

CAUSTIC SODA (NaOH) TESTING PROCESS

Recipe:
  • Hydrochloric acid (HCl) .....................3.75 gm+ 100ml water = 0.45N HCl
  • Phenolphthalein (C20H14O4) ............0.1% solution
  • Caustic soda (NaOH) ........................2.0% solution
  • Water ................................................49.0 ml
Testing Procedure:
  1. Caustic soda (1.0 ml) and Phenolphthalein- As Indicator (1 drop) are taken in a glass flask.
  2. Water (49.0 ml) added to the solution.
  3. Hydrochloric Acid is kept pouring from burette into the flask drop by drop until the solution color turns into pink.
  4. Burette reading is taken
Calculation:
(Burette Reading x 0.45N x 0.04 x 100) / NaOH Weight = %Purity

FORMIC ACID (CH3COOH) TESTING PROCESS

Recipe:
  • Caustic soda (NaOH) ...................4.0% solution
  • Phenolphthalein (C20H14O4) .......0.1% solution
  • Hydrochloric acid (HCl) ................3.75 gm+ 100ml water = 0.45N HCl
Testing Procedure:
  1. Formic acid (10ml) and Phenolphthalein- As Indicator (3 drops) are taken in a glass flask.
  2. Caustic Soda is kept pouring from burette into the flask drop by drop until the solution color turns into pink.
  3. Burette reading is taken
Calculation:
Burette reading x 10= Purity %

HYDROCHLORIC ACID(HCl) TESTING PROCESS

Recipe:
  • Caustic soda (NaOH) ....................0.4% solution
  • Phenolphthalein (C20H14O4) ........0.1% solution
  • Hydrochloric acid (HCl) ................1.0 gm + 100ml Water`
Testing Procedure:
  1. Hydrochloric acid (25ml) and Phenolphthalein- As Indicator (3 drops) are taken in a glass flask.
  2. Caustic Soda is kept pouring from burette into the flask drop by drop until the solution color turns into pink.
  3. Burette reading is taken
Calculation:
(BURETTE READING X 0.1N X 0.365 X 400) / HYDROCHLORIC ACID WEIGHT = %Purity

HYDROGEN PEROXIDE (H2O2) TESTING PROCESS


Recipe:
  • Hydrogen Peroxide (H2O2) ......................0.12% solution
  • Sulphuric Acid (H2SO4) ...........................20% solution
  • Potassium Permanganate (KMnO4) ..........1.0 gm + 100ml Water
Testing Procedure:
  1. Hydrogen Peroxide (50ml or 0.06gm) and Sulphuric acid (10ml or 2gm) are taken in a glass flask.
  2. Potassium Permanganate is kept pouring from burette into the flask drop by drop until the solution color turns into pink.
  3. Burette reading is taken
Calculation:
[Burette Reading X 0.17 (Constant)] / Hydrogen Peroxide weight = %Purity

SODA ASH (Na2CO3) TESTING PROCESS

Recipe:
  • Sulphuric Acid (H2SO4)  .....................0.49 gm + 99.51 ml water
  • Soda Ash (Na2Co3) ............................0.53% solution
  • Methyl Orange .....................................0.1% solution
Testing Procedure:
  1. Soda Ash (10ml) and Methyl Orange - As Indicator (3 drops) are taken in a glass flask.
  2. Sulphuric Acid is kept pouring from burette into the flask drop by drop until the solution color turns into pink.
  3. Burette reading is taken
Calculation: 
Burette reading x 10= Purity %

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