Barite Supplier & Exporter — API 13A Drilling Grades and White Barite Powder
BaSO₄ Barium Sulfate · SG 4.10 – 4.40
API 13A drilling barite at specific gravity 4.20 and 4.10, and high-brightness white barite powder at 95% BaSO₄ for paint, plastics and rubber. Independently tested to API 13A and NISOC methods, shipped in bulk or jumbo bags with a batch-specific Certificate of Analysis.
SG ≥ 4.20
Supply capability at a glance
4.21 g/cm³
Tested density, API 13A grade
25 MT
MOQ — bagged (1 × 20ft)
7–14 days
Lead time, standard grades
Per batch
Certificate of Analysis
Physical Properties
Formula
BaSO₄
HS Code
2511.10
CAS No.
7727-43-7
Specific Gravity
4.10 – 4.40
Mohs Hardness
3.0 – 3.5
Solubility
Insoluble in water
Synonyms: Baryte, Barytes, Barium Sulfate, Heavy Spar, Drilling Mud Additive · Chemically inert, non-combustible solid; white to off-white powder or lump.
Six-digit WCO heading — national subheadings vary by destination.
Grades & Chemical Analysis
Four barite grades — two API drilling weights and two chemical / filler grades. Select a grade to view its full analysis; every shipment includes a certificate of analysis.
Drilling Grade — API 13A weighting agent
API Barite 4.20
- Density
- 4.21 g/cm³ (min 4.20)
- pH before heating 180°F
- 7.9 (min 6.5)
- pH after heating 180°F
- 7.1 (min 6.5)
- Apparent Viscosity, before gypsum
- 97.5 cP (max 125)
- Apparent Viscosity, after gypsum
- 112.5 cP (max 125)
- Retained on No. 200 sieve
- 2.04 %wt (max 3)
- Retained on No. 325 sieve
- 10.7 %wt (10 ± 5)
- Alkaline earth metals as Ca
- 160 ppm (max 250)
- Clay Content
- 2.75 lb/bbl (max 3)
- Less than 6 µm
- Max 30 %wt
Drilling grades tested to API 13A and NISOC laboratory methods under ISO/IEC 17025 accreditation. Values are typical specification ranges; a batch-specific CoA is issued per shipment.
Barite — Certified API 13A Analysis
The 4.20 drilling grade as certified, not a specification band. Density is the number the grade is bought on; the viscosity pair either side of a gypsum addition is the one that says whether the mud will still pump after it has been contaminated.
| Test | Method | Acceptance Limit | Result |
|---|---|---|---|
| Density | API 13A | min 4.10 / 4.20 g/cm³ | 4.21 g/cm³ |
| pH, before heating at 180 °F | NISOC | min 6.5 | 7.9 |
| pH, after heating at 180 °F | NISOC | min 6.5 | 7.1 |
| Apparent viscosity, before gypsum | NISOC | max 125 cP | 97.5 cP |
| Apparent viscosity, after gypsum | NISOC | max 125 cP | 112.5 cP |
| Retained on No. 200 sieve | NISOC | max 3% wt | 2.04% wt |
| Retained on No. 325 sieve | NISOC | 10 ± 5% wt | 10.7% wt |
| Alkaline earth metals as calcium | NISOC | max 250 ppm | 160 ppm |
| Clay content | IPS | max 3 lb/bbl | 2.75 lb/bbl |
Tested by an ISO/IEC 17025 accredited drilling-fluids laboratory. The two viscosity rows are the same sample before and after a gypsum addition, which is how API 13A checks that a barite will not flocculate the mud when it meets anhydrite downhole. A batch-specific CoA is issued per shipment.
Bespoke Production
Need a different specific gravity or mesh?
If none of the grades above matches your target chemistry, fineness, or packaging, tell us your requirements — we produce custom grades to your exact specification.
Applications
Barite earns its place two ways — extreme density for drilling and radiation shielding, and chemical inertness for fillers and pigments.
Oil & Gas Drilling Fluids
Weighting agent controlling formation pressure in water and oil-based muds.
Paints & Coatings
Inert extender giving body, opacity and chemical resistance.
Plastics & Rubber
Density and stiffness filler in masterbatch and compounds.
Radiation Shielding Concrete
High-density aggregate for medical and nuclear walls.
Barium Chemicals
Feedstock for barium carbonate, chloride and hydroxide.
Automotive Friction Products
Filler in brake pads and clutch linings.
Glass & Ceramics
Fluxing and brightening agent in specialty glass.
Paper Coating
Filler and coating pigment for high-gloss grades.
Medical Contrast Media
Refined barium sulfate for radiographic imaging.
Product Gallery
Material as it is stored, graded and loaded for export.
Packaging, Logistics & Trading Terms
How we package, certify and ship bulk barite. Terms can be adapted by agreement — tell us what your operation needs.
- Minimum Order Quantity
- 1 × 20 ft container (approx. 25 MT) bagged. 500 MT minimum for bulk vessel. Trial quantities available for qualification.
- Packaging
- Bulk, 1–1.5 MT woven jumbo bags (single or four-loop), or 25 kg / 50 kg PP bags. Lump supplied in bulk or jumbo bag.
- Incoterms & Loading Ports
- EXW, FOB, CFR and CIF (Incoterms® 2020). Standard loading at Bandar Abbas and Bandar Imam Khomeini; other ports by arrangement.
- Quality Certification
- Batch-specific CoA with every shipment covering specific gravity, sieve residue, soluble alkaline earth metals and clay content, tested to API 13A. SGS / Bureau Veritas inspection at buyer’s cost.
- Lead Time
- 7–14 days for standard grades after order confirmation; 15–25 days for custom-milled or specially packed material.
- Storage & Handling
- Store dry and covered. Barite is chemically inert and non-combustible with no shelf-life limit, but caking is possible if bags take on moisture. Avoid generating dust when handling — the ore contains a small crystalline silica fraction.
Certificate of Analysis
A batch-specific CoA is issued with every shipment. Third-party inspection by SGS, Bureau Veritas or an inspector of your choice can be arranged at the buyer’s cost.
Ready to quote
Send us your grade, tonnage, destination port and packaging and we will return a firm FOB/CFR/CIF price with lead time.
Request a Barite Quote