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Particle-size designationD50 specifiedColorWhite
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Physical formPowder
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CAS No.7727-43-7Purity98%min
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AppearanceWhite PowderApplicationCoating,Paint
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ClassificationSulphateEINECS No.231-784-4
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Grade StandardAgriculture Grade, Electron Grade, Industrial GradeMolecular FormulaBASO4
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Other Namesblanc fixeTypeBarium Sulfate
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ColorWhiteD50 (μm)0.5
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Whiteness98%Hs code2833270000
Two equal percentages can describe very different powder properties. This white precipitated barium sulfate has stated minimum purity of 98% and powder whiteness of 98%, alongside D50 of 0.5 μm. Also named blanc fixe, it is presented for coating and paint enquiries.
Build separate composition and colour checks
Use the minimum-purity threshold to define the assay requirement for the selected sample. Review the whiteness percentage through its own optical method and reference. The matching numbers should not be combined into a general quality score or treated as interchangeable acceptance measurements.
- Composition acceptance
- Request current analysis against the stated minimum purity.
- Powder-colour acceptance
- Agree on the whiteness method required for the comparison.
Make the 0.5 μm median comparable
Obtain the full particle report and the sample-preparation method behind D50. Compare another powder on a matched analytical basis rather than using the median as a complete size distribution. Ask which part of the distribution matters to the intended coating process.
Let the paint trial determine the application result
Define the binder, processing conditions and film criteria before evaluating the material. Assess the actual coating against those requirements instead of inferring a performance advantage from a fine-particle or high-quality description. Specialised grade requirements need a separate specification and relevant evidence.
Keep the comparison tied to the sample
Retain the assay, particle and whiteness reports with the material used in the trial. This gives the final selection a traceable basis in measured powder properties and the intended paint result.
