CAS 1309-37-1
Iron Oxide Pigments
Iron Oxide Pigments are durable, low-cost red, yellow and black pigments for concrete, paving, paints, plastics and ceramics.
Synthetic iron oxides are the second-largest pigment family after titanium dioxide. Red is ferric oxide (Fe₂O₃), yellow is iron oxyhydroxide (FeOOH) and black is magnetite (Fe₃O₄). Blending them gives browns, tans and terracotta shades. They are non-toxic, lightfast, weather-resistant and stable in the alkaline environment of cement.
That combination makes iron oxides the standard colourant for concrete pavers, roof tiles and coloured mortar, as well as primers, industrial paints, plastics and ceramics. Synthetic grades are purer, brighter and more consistent than natural ochres, which matters when a project needs every batch of pavers to match.
- CAS number
- 1309-37-1
- Grades / forms
- Red, yellow, black
- Industries
- Paints, Inks & Coatings
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Get a price for Iron Oxide Pigments
Send quantity, grade and destination port. Pricing, lead time and documentation come back within one business day.
Request a quotation- Certificate of Analysis with every batch
- MSDS in destination format
- Toll manufacturing to your specification
- Private label packing available
Typical applications
- Concrete pavers, blocks and roof tiles
- Coloured mortar and render
- Primers, anti-corrosive and industrial paints
- Plastics and rubber
- Ceramics and glazes
Packing options
- 25 kg multi-wall paper bags
- 1,000 kg jumbo bags
Storage & handling
Store dry. Iron oxides are stable and non-hazardous.
Documentation
Certificate of Analysis, MSDS, Certificate of Origin, dangerous goods declaration where applicable, and third-party pre-shipment inspection on request.
Typical specification
- Fe₂O₃ content (red)
- ≥ 95%
- Tinting strength
- 95–105% against standard
- Residue on 45 µm sieve
- ≤ 0.3%
- Water-soluble salts
- ≤ 0.5%
- Colours
- Red, yellow, black and blends
Typical values for reference. The exact specification is agreed before the order and confirmed on the Certificate of Analysis for each batch.
Iron Oxide Pigments — frequently asked
Iron oxide pigment is typically added at 2–5% of the cement weight. Colour strength stops increasing beyond about 5–6%, and very high levels can affect concrete strength, so dosages above that are rarely economical.
Synthetic iron oxides are manufactured under controlled conditions, giving higher purity, brighter colour, higher tinting strength and better batch-to-batch consistency than natural ochres and siennas.
Yellow iron oxide is an oxyhydroxide that begins to lose water above about 180 °C and turns red. For high-temperature uses such as some plastics and coil coatings, heat-stable grades or other yellow pigments are used.
Yes. Chemtrade manufactures and exports Iron Oxide Pigments (CAS 1309-37-1) from Surat, Gujarat, India to more than 55 countries, for customers in Paints, Inks & Coatings. Send your grade, quantity and destination port for a quotation within one business day.
Every shipment of Iron Oxide Pigments from Chemtrade includes a batch-specific Certificate of Analysis (COA) and Material Safety Data Sheet (MSDS). Certificate of Origin, third-party pre-shipment inspection and destination-specific regulatory documentation are arranged on request.
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