Black Iron Oxide — Pharma Grade Colour Supplier, Hyderabad
Product Overview
Black Iron Oxide (Magnetite, Fe₃O₄) is a synthetic inorganic black pigment used in pharmaceutical tablet coatings, hard capsule printing inks, and cosmetic products. It provides a deep black to grey colouration and is highly stable across pH and temperature ranges encountered in pharmaceutical processing and storage.
Specifications
| CAS Number | 1317-61-9 |
| Molecular Formula | Fe₃O₄ |
| Appearance | Black powder |
| Iron Oxide Content | NLT 95.0% |
| Loss on Drying | NMT 1.5% |
| Grades | IP / BP / EP / USP |
| Packaging | 25 kg HDPE bags |
Applications
- Black pigment in pharmaceutical tablet film coatings
- Capsule imprinting ink ingredient
- Cosmetic mascara and eyeliner pigment
- Blended with TiOâ‚‚ to produce grey shades
- Nail polish and cosmetic colour pigment
- Industrial and ceramic pigment
Why Source from Surravi Phharma?
- Ready stock maintained in our centralised AC warehouse, Hyderabad
- IP / BP / EP / USP grades available
- Complete documentation: COA, MSDS, Regulatory certifications
- Flexible quantities — lab scale to bulk commercial
- Prompt delivery with pan India logistics support
Frequently Asked Questions
Where can I buy Black Iron Oxide pharma grade in Hyderabad?
Surravi Phharma supplies Black Iron Oxide (Fe₃O₄, Magnetite) in IP, BP, EP, and USP grades in Hyderabad with ready stock. Used in tablet film coatings, capsule printing inks, and cosmetics. Call +91 8008002576.
What is Black Iron Oxide used for in pharmaceutical manufacturing?
Black Iron Oxide has two main pharmaceutical uses: (1) as a pigment in tablet film coatings to produce dark grey, dark brown, or black tablets, and (2) as the key ingredient in capsule imprinting inks (edible inks used to print batch numbers and product codes on capsules and tablets).
Is Black Iron Oxide the same as carbon black?
No. Black Iron Oxide (Fe₃O₄) is an inorganic iron compound approved for pharmaceutical and cosmetic use. Carbon Black is not approved for oral pharmaceutical use. Black Iron Oxide is the correct and approved black pigment for pharmaceutical tablet coatings and capsule inks.
What shades can be produced using Black Iron Oxide?
Black Iron Oxide with Titanium Dioxide produces grey shades ranging from light silver-grey to dark charcoal depending on the ratio. With Red and Yellow Iron Oxide, it produces brown and dark earth tones. Alone at high concentrations it gives deep black coatings.
What is the particle size specification for pharma grade Black Iron Oxide?
Pharmaceutical grade Black Iron Oxide should have a D90 particle size of less than 10 μm for good dispersion in coating systems. Our grade is supplied as a fine powder with iron oxide content NLT 95% and loss on drying NMT 1.5%, meeting IP/BP/USP specifications.