Talc technical requirements (National Standards)

2016-7-20 9:33:42 Traffic：

Talc (14807-96-6) specifications:

    Grade plastics, rubber grade, cosmetic grade, pharmaceutical - food grade talc product quality should meet the following national standard GB 15342-94:

    1. Plastic Talc technical requirements

                           Premium grade First grade Qualified

Whiteness /% ≥ 90.0 85.0 80.0

Fineness (45μm through rate) /% ≥ 99.0 98.0 95.0

Cumulative particle size distribution content

 <20μm /% ≥ 80.0 72.0 60.0

 <10μm /% ≥ 50.0 36.0 26.0

 <5μm /% ≥ 30.0 16.0 12.0

Silica /% ≥ 61.0 58.0 55.0

MgO /% ≥ 31.0 29.0 27.0

Ferric oxide /% ≤ 0.50 1.00 1.50

Aluminum oxide /% ≤ 1.00 2.00 3.00

Calcium oxide /% ≤ 0.50 1.50 4.50

Loss on ignition (1000 ℃) /% ≤ 6.00 8.00 9.00

Bulk density

  Bulk density / (g / cm3) ≤ 0.45 0.55 0.65

  Tightness / (g / cm3) ≤ 0.90 0.95 1.00

Moisture /% ≤ 0.50 0.50 1.00

    2. Talc rubber technical requirements

                           Premium grade First grade Qualified

Moisture /% ≤ 0.5 0.7 1.0

Fineness (75μm through rate) /% ≥ 99.9 99.5 99.0

Loss on ignition (1000 ℃) /% ≤ 7.00 9.00 24.00

pH of 8.0 to 10.0 8.0 to 10.0 8.0 to 10.0

In Acid /% ≤ 6.0 15.0 20.0

Acid-soluble iron (Fe2O3 to count) /% ≤ 1.00 2.00 3.00

Soluble copper /% ≤ 0.005 0.005 0.005

Soluble Mn /% ≤ 0.05 0.05 0.05

    3. Cosmetic grade talc technical requirements

                           Premium grade First grade Qualified

Whiteness /% ≥ 90.0 85.0 80.0

Moisture /% ≤ 0.5 0.7 1.0

That was when iron salts are not blue

Water soluble matter /% ≤ 0.1 0.1 0.1

In Acid /% ≤ 1.5 2.0 4.0

Degree of fineness

  75μm by rate /% ≥ 98.0 98.0 98.0

  45μm by rate /% ≥ 98.0 98.0 98.0

Loss on ignition (1000 ℃) /% ≤ 5.50 6.50 7.00

Arsenic /% ≤ 3 × 10-4 3 × 10-4 3 × 10-4

Lead /% ≤ 20 × 10-4 20 × 10-4 20 × 10-4

Bacteria / (a / g) Total 500; mold 100; not detected pathogens ①

Amphibole asbestos minerals ≤ X-ray diffraction analysis can not be found

   ① mainly refers to bacteria Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa.

    4. Pharmaceutical, food-grade talc technical requirements

                           Premium grade First grade Qualified

Characters odorless, tasteless, no sand particles, lubrication sense

Whiteness /% ≥ 90.0 85.0 80.0

Moisture /% ≤ 0.5 0.7 1.0

Bacteria / (a / g) Total 500; mold 100; not detected pathogens ①

Loss on ignition (1000 ℃) /% ≤ 6.00 6.50 6.50

Water soluble matter /% ≤ 0.1 0.1 0.1

PH neutral reaction litmus paper

In Acid /% ≤ 1.5 1.5 1.5

That was when iron salts are not blue

Degree of fineness

  75μm by rate /% ≥ 98.0 98.0 98.0

  45μm by rate /% ≥ 98.0 98.0 98.0

Arsenic /% ≤ 3 × 10-4 3 × 10-4 3 × 10-4

Lead /% ≤ 10 × 10-4 10 × 10-4 10 × 10-4

Heavy Metal /% ≤ 40 × 10-4 40 × 10-4 40 × 10-4

   ① mainly refers to bacteria Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa.

    Cosmetics and industrial steatite talc product quality should meet the following national standard GB 15341-94

    5. Cosmetics steatite technical requirements

                           Premium grade First grade Qualified

Whiteness /% ≥ 90.0 85.0 80.0

Silica /% ≥ 61.0 59.0 58.0

MgO /% ≥ 31.0 30.0 29.0

Ferric oxide /% ≤ 0.50 1.00 1.30

Aluminum oxide /% ≤ 1.00 1.50 2.00

Calcium oxide /% ≤ 0.50 1.50 1.50

Loss on ignition (1000 ℃) /% ≤ 5.50 6.00 6.50

Water soluble matter /% ≤ 0.1 0.1 0.1

In Acid

  Cosmetics block /% ≤ 1.5 2.0 4.0

  Medicine - food block /% ≤ 1.5 1.5 1.5

That was when iron salts are not blue

Arsenic /% ≤ 3 × 10-4 3 × 10-4 3 × 10-4

Lead /% ≤ 10 × 10-4 10 × 10-4 10 × 10-4

Amphibole asbestos minerals X-ray diffraction analysis can not be found

    6. Industrial talc technical requirements

                             Chunk and block the small talc talc

                       Premium grade First grade Qualified No. 1 on the 23rd

Whiteness /% ≥ 90.0 85.0 80.0 80.0 75.0 60.0

Silica /% ≥ 61.0 58.0 53.0 54.0 48.0 35.0

MgO /% ≥ 31.0 29.0 27.0 29.0 27.0 25.0

Ferric oxide /% ≤ 0.50 1.00 1.50 1.50 2.50 -

Aluminum oxide /% ≤ 1.00 1.50 2.00 2.00 3.00 -

Calcium oxide /% ≤ 0.50 1.20 2.50 2.50 5.00 -

Loss on ignition (1000 ℃) /% ≤ 6.00 8.00 12.00 - - -

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