Product: Caustic Soda Liquor 10%

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Specification No: CAU010

Appearance: Virtually clear colourless liquid

Sodium Hydroxide (NaOH)          % w/w                                     9 – 11
Sodium Chloride (NaCl)                ppm           max                     100
Sodium Carbonate (Na2CO3)       % w/w         max                     0.1
Sodium Chlorate (NaClO3)           ppm           max                     65
Sodium Sulphate (Na2SO4)          ppm           max                     150
Iron (Fe)                                            ppm           max                     5
Cadmium (Cd)                                 ppm           max                     0.01
Mercury (Hg)                                   ppm           max                     0.1
Heavy Metals (as Pb)                     ppm           max                     10

Product: Caustic Soda Liquor 25% Membrane Grade

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Specification No: CAU004

Appearance: Colourless, clear to slightly turbid liquid.

Sodium Hydroxide (NaOH)           % w/w                                     24.0 – 26.0
Sodium Carbonate (Na2CO3)        % w/w        max                     0.1
Sodium Chloride (NaCl)                 ppm           max                     60
Sodium Sulphate (Na2SO4)            ppm           max                     40
Sodium Chlorate (NaClO3)             ppm          max                     15
Iron (Fe)                                             ppm           max                     10

Product: Caustic Soda Liquor 25% Rayon

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Specification No: CAU011

This product conforms to BS EN 896 (Type 2), Commission Directive 2008/84/EC (E524) and the Food Chemicals Codex, VII.
(It cannot be assumed that Caustic Soda meeting the test requirements of the Food Chemicals Codex is satisfactory for all food or food related applications without an assessment against appropriate regulations by the user.)

Appearance: Colourless, clear to slightly turbid liquid

Specific gravity at 20°C                                                              1.278 ± 0.01
Sodium Hydroxide NaOH              % w/w                                 24.0 – 26.0
Sodium Carbonate (Na2CO3)        % w/w          max                 0.2
Sodium Chloride (NaCl)                 % w/w          max                 0.01
Sodium Sulphate (Na2SO4)            % w/w          max                0.01

Arsenic (As)                                   mg/kg         max                     5.0
Cadmium (Cd)                              mg/kg         max                     2.5
Chromium (Cr)                             mg/kg         max                     2.5
Iron (Fe)                                        mg/kg         max                     5.0
Mercury (Hg)                                  mg/kg         max                    0.5
Nickel (Ni)                                      mg/kg         max                     5.0
Lead (Pb)                                      mg/kg         max                     5.0
Antimony (Sb)                                mg/kg         max                     2.5
Selenium (Se)                                mg/kg         max                     2.5
Heavy Metals (as Pb)                     mg/kg         max                     10.0

Product: Caustic Soda Liquor 32% Membrane Grade

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Specification No: CAU001

Appearance                                   Colourless, clear to slightly turbid liquid.

Sodium Hydroxide (NaOH)             % w/w                                    31.0 – 33.0

Sodium Carbonate (Na2CO3)        % w/w          max                    0.2
Sodium Chloride (NaCl)                 ppm           max                     100
Sodium Chlorate (NaClO3)             ppm           max                     65
Sodium Sulphate (Na2SO4)            ppm           max                     100

Arsenic (As)                                   ppm           max                     1.0
Cadmium (Cd)                               ppm           max                     0.5
Chromium                                      ppm          max                     0.5
Iron (Fe)                                        ppm           max                     10
Lead (Pb)                                        ppm          max                     0.25
Mercury (Hg)                                  ppm           max                     0.05
Nickel (Ni)                                      ppm           max                     1.0
Antimony (Sb)                                ppm           max                     2.5
Selenium (Se)                                ppm           max                     2.5

Product: Caustic Soda Liquor 47% Membrane Grade

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Specification No: CAU002M

Appearance: Colourless, clear to slightly turbid liquid.

Sodium Hydroxide (NaOH)            % w/w                                     46.0 – 48.0
Sodium Carbonate (Na2CO3)         ppm           max                     1000
Sodium Chloride (NaCl)                 ppm           max                     100
Sodium Chlorate (NaClO3)             ppm           max                     60
Sodium Sulphate (Na2SO4)            ppm           max                     100

*Arsenic (As)                                  ppm           max                     1.0
*Cadmium (Cd)                              ppm           max                     0.5
*Chromium                                     ppm          max                     0.5
*Iron (Fe)                                       ppm           max                     5.0
*Lead (Pb)                                     ppm          max                     1.0
*Mercury (Hg)                                ppm           max                     0.05
*Nickel (Ni)                                     ppm           max                     1.0
*Antimony (Sb)                               ppm           max                     2.5
*Selenium (Se)                               ppm           max                     2.5

*Conforms to the test requirements of EN896 Type 1 and Food Chemicals Codex Vol V.

It cannot be assumed that Caustic Soda meeting the test requirements of the Food Chemicals Codex Vol V is satisfactory for all food or food related applications without an assessment against appropriate regulations by the user.

Product: Caustic Soda Liquor 50% Membrane Grade

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Specification No: CAU006M

Appearance: Colourless, clear to slightly turbid liquid.

Sodium Hydroxide (NaOH)             % w/w                                     49.9

Sodium Carbonate (Na2CO3)        % w/w        max                     0.3
Sodium Chloride (NaCl)                 ppm           max                     50
Sodium Sulphate (Na2SO4)            ppm           max                     35

Aluminium (Al)                                ppm           max                     0.2
Antimony (Sb)                                ppm           max                     2.0
Cadmium (Cd)                               ppm           max                     0.1
Chromium                                      ppm          max                     0.5
Copper (Cu)                                  ppm           max                     0.1
Fluoride (F)                                   ppm           max                     0.1
Iron (Fe)                                        ppm           max                     2.0
Lead (Pb)                                       ppm          max                     0.1
Manganese (Mg)                            ppm           max                     1.0
Mercury (Hg)                                  ppm           max   less than test method limit
Nickel (Ni)                                      ppm           max                     1.0
Selenium (Se)                                ppm           max                     4.0
Zinc (Zn)                                        ppm           max                     0.1
Heavy metals as (Pb)                     ppm           max                     10.0

Nexchem Ltd are distributors of Caustic Soda Liquor 32%.

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