Pigment Substitution Guide: Lead, Cadmium and Banned Pigment Replacements

Pigment substitution is the single most common compliance project crossing a formulator’s desk in 2026. Lead chromate yellows that powered industrial paints for fifty years, cadmium reds that gave plastics their iconic saturation, hexavalent chromium primers, and uncertified azo grades carrying banned-amine residues are all on the regulatory exit ramp. This guide walks through which legacy pigments are restricted, why, what replaces them in the Kanani REACH-safe portfolio, and how to manage the technical and commercial tradeoffs of the swap.

Why pigment substitution matters in 2026

Four regulatory tracks converge on legacy inorganic and uncertified azo pigments and they are tightening every year:

REACH Annex XVII restricts substances of very high concern (SVHC) across the EU. Entry 23 covers cadmium, entry 63 covers lead and its compounds. The SVHC candidate list is reviewed twice a year by ECHA and additions in 2024 and 2025 have brought several historical pigment intermediates into focus. Once a substance is listed, downstream users have a fixed sunset date to reformulate.

EU Toy Directive 2009/48/EC sets soluble heavy metal migration limits in toy materials at levels lead chromate and cadmium pigments cannot meet: 2.0 mg/kg lead, 1.3 mg/kg cadmium, 0.02 mg/kg hexavalent chromium in scraped-off toy material. Every toy maker exporting into the EU has reformulated, and their resin and coating suppliers have followed.

China RoHS (GB/T 26572) mirrors EU RoHS thresholds for electrical and electronic equipment with mandatory labelling of restricted substance content. Major Chinese OEMs flow these requirements upstream to their paint, plastic, and coating suppliers, which means Indian, Vietnamese, and Indonesian formulators selling into China-tier-1 supply chains face the same constraints.

India BIS for toys (IS 9873) and cosmetics (IS 4707, IS 7299) aligns with EU Toy Directive limits and prohibits lead and cadmium in cosmetic colour additives. India’s CDSCO and BIS frameworks now require certified pigment documentation for any imported colourant used in regulated consumer categories.

The pattern is consistent: lead, cadmium, hexavalent chromium, and banned-amine azo residues are unsafe at levels achievable with the inorganic pigments that historically delivered those colour spaces. Every market that matters for a Tier 1 or Tier 2 pigment buyer has aligned on the exit. The question is no longer whether to substitute, but which replacement and how to manage the tradeoffs.

The four categories of restricted pigments

Substitution decisions break cleanly into four families. Each family has a different chemistry, a different regulatory citation, and a different replacement class.

1. Lead-based pigments

Lead chromate yellows and oranges were the workhorse opaque pigments for road paints, agricultural and construction equipment coatings, plastics colourant, and industrial enamels. They delivered exceptional opacity, very high tinting strength, and a clean masstone at low cost.

• PY34 Lead chromate yellow (CI 77600) and lead sulfochromate
• PY36 Lead chromate molybdate sulfate (CI 77605)
• PO21 Chrome orange (basic lead chromate)
• PR104 Molybdate orange and molybdate chromate (CI 77605)

Status: restricted in EU under REACH Annex XVII entry 63 since 2015. The remaining authorisation routes have either expired or are exhausted in practice. Banned for any consumer-facing application in the EU. Restricted under EU Toy Directive 2009/48/EC, China RoHS, and India BIS for toys and cosmetics. Major US, Japanese, and Korean OEM specifications have aligned.

2. Cadmium-based pigments

Cadmium pigments delivered the brightest, most saturated reds, oranges, and deep yellows available, with exceptional heat stability for engineering plastics. They were the colour reference for tractor red, fire engine red, and high-performance polymer applications.

• PR108 Cadmium sulfoselenide red (CI 77202)
• PR113 Cadmium mercury red
• PY35 Cadmium yellow (CI 77199)
• PY37 Cadmium zinc yellow
• PO20 Cadmium orange (CI 77202)

Status: restricted in EU under REACH Annex XVII entry 23 above 0.01 percent (100 mg/kg) by mass in plastics, paints, and brazing fillers. RoHS sets the same 0.01 percent threshold for electronics. EU Toy Directive limits soluble cadmium migration to 1.3 mg/kg in scraped-off material. Banned in cosmetics globally. India BIS aligns for toys and cosmetic categories.

3. Banned aromatic amine azo pigments

Some traditional azo pigments are derived from aromatic amines on the EU 24-banned list (Directive 2002/61/EC, EN ISO 14362). The pigment itself is not banned by name, but uncertified grades that release any of the 24 amines above 30 mg/kg under reductive cleavage are illegal in EU markets.

Pigments most commonly affected: PY12, PY13, PY14 (diarylide yellows derived from 3,3’-dichlorobenzidine), PO13, PO34 (diarylide oranges from the same precursor), PR23, certain PR53:1 grades.

Status: certified modern manufacturing routes for these pigments produce grades that pass EN ISO 14362 at the 30 mg/kg threshold. Grey-market or older grades may fail. The full background, the 24-amine list, and the testing methodology are covered in The 24 Banned Aromatic Amines: Complete Reference.

4. Hexavalent chromium pigments

Hexavalent chromium pigments and corrosion inhibitors were standard in industrial, aerospace, and automotive primers for decades.

• Zinc chromate (CI 77955)
• Strontium chromate (CI 77839)
• Lead chromate Cr(VI) component
• Some chromium-containing complex inorganic colour pigments (CICP) where Cr(VI) is present rather than Cr(III)

Status: restricted under RoHS at 0.1 percent maximum for electrical and electronic equipment. Restricted under REACH Annex XVII entry 47 for chromium VI in cement and articles. EU Toy Directive sets a 0.02 mg/kg soluble Cr(VI) migration limit. Aerospace and military have transitioned to non-chromate primers under regional environmental rules.

Substitution table

The table below maps the most common legacy pigments to recommended Kanani REACH-safe replacements, with the application context and the practical tradeoffs to expect.

Lead chromate replacement deep dive

Lead chromate yellows (PY34, PY36) sit at an exceptional combination of properties that no single organic pigment replicates: high opacity (hiding power 80 to 90 percent in clean coatings), high tinting strength (8 to 12 in standard formulations), clean masstone, modest heat stability, and unit cost that no organic high-performance pigment touches.

The substitution problem is real. A formulator swapping PY34 for PY83 will see opacity drop by 30 to 50 percent. Compensating with higher loading partially closes the gap but raises cost, can affect rheology in coatings, and can compromise gloss. Compensating with TiO₂ increases hiding but moves the masstone toward a less saturated, milkier yellow. The realistic engineering answer combines:

• Higher organic pigment loading (typically 1.3x to 1.7x the legacy lead chromate loading)
• TiO₂ blend for opacity, accepting a slight loss in saturation
• Selection of the right organic chemistry for the application: PY83 for general industrial cost-balanced use, PY154 for higher lightfastness, PY180 for outdoor durability, bismuth vanadate PY184 where opacity must approach the legacy lead chromate (premium cost, but the closest one-to-one opacity match)

Tinting strength delta matters in computer colour matching (CCM) systems. The tinter database needs reformulation for the replacement pigment because the colour-strength curve, the masstone, and the undertone all shift. Plan for one to two weeks of CCM database rework when switching out a high-volume PY34 tinter. The CCM rework is the single largest hidden cost in lead chromate substitution and is usually underestimated in the initial budget.

Cost increase: 2 to 4x at the pigment level, narrowing to 1.5 to 2.5x at the finished-coating level after accounting for higher loading and the TiO₂ contribution.

Cadmium red replacement deep dive

Cadmium red PR108 has a colour signature that is hard to reproduce: dense, slightly muted masstone, exceptional heat stability up to 300 C in engineering plastics, BWS 7 to 8 lightfastness, and dimensional stability across processing temperatures and resin systems. It is the colour of fire engines, industrial equipment, and premium engineering plastics for a reason.

The replacement decision splits on two axes: lightfastness requirement and cost tolerance.

Quinacridone PR122 is the high-lightfastness benchmark. BWS 7 to 8, exceptional weathering, magenta-to-violet masstone with a clean blue undertone. PR122 is transparent in masstone, so applications that require opacity (most coatings and most plastics in pigmented form) need a TiO₂ blend. Cost is 3 to 4x cadmium PR108 at the pigment level.

Naphthol PR170 (F5RK or F3RK grades) is the cost-balanced replacement. BWS 6 to 7, good outdoor durability for two to three years on most substrates, slightly bluer undertone than PR122. Cost is 1.5 to 2.5x cadmium PR108 at the pigment level. PR170 is the practical choice for decorative paints, low-end industrial coatings, packaging plastics, and any application where cost dominates over BWS 7+ lightfastness.

DPP red PR254 is the saturation reference. Highest chroma of any replacement, BWS 7 to 8, heat stability to 300 C in engineering plastics, the closest one-to-one shade match for cadmium red in plastics colourant. Cost is 4 to 6x cadmium PR108 at the pigment level. Justified only where the cadmium-class saturation is non-negotiable.

A common production-tested formulation for engineering plastics: 70 percent PR254 plus 30 percent TiO₂ at the same total loading as the legacy cadmium PR108 will deliver a near-identical visual match in PA, PBT, and PET resin systems with 280 C+ processing.

How to manage shade match in substitution

Shade matching the substitute against the legacy standard is the single most underestimated step in pigment substitution projects. A reasonable workflow:

1. Standardise the legacy reference. Maintain a stable physical sample of the legacy colour in the application substrate. Do not use a digital colour value alone (Lab measurements drift across instruments and viewing geometries).
2. Measure on a calibrated spectrophotometer. Capture L*, a*, b*, and the full reflectance curve. A bench-top sphere geometry instrument (BYK, X-Rite, Konica Minolta) is the standard.
3. Define delta E acceptance. For most decorative and industrial coatings, delta E 2000 below 1.0 against the legacy standard is the production target. For automotive and OEM-spec applications, delta E below 0.5. For consumer plastics, delta E 1.5 is often acceptable depending on the application.
4. Adjust the tinter system. Reformulate the CCM database with the replacement pigment loading curve, masstone, and undertone. Verify with at least 6 to 10 reference shades from the existing colour collection, not just the closest masstone.
5. Validate under multiple illuminants. Metameric pairs that match under D65 daylight can fail under TL84 store lighting or A incandescent. Run a metameric index (MI) check across at least D65, A, and F11.
6. Run accelerated weathering on the final formulation. QUV or xenon-arc 500 to 1000 hours per ISO 11341 / ASTM G155, against the legacy standard. The substitute can match perfectly at time zero and drift at 200 hours; the legacy lead or cadmium standard is the benchmark for stability and the organic substitute must hold against it.

Spectrophotometer-driven CCM rework is the dominant time and cost line in any large substitution project. Budget two to four weeks for a colour collection of 50+ shades.

Documentation when substituting

A substitution is a chemical identity change in the formulation. The downstream documentation chain has to follow.

1. Updated TDS (Technical Data Sheet). New CI number, new CAS, updated tinting strength, opacity, lightfastness, heat stability, and recommended loading range for the substitute pigment.

2. Reissued SDS (Safety Data Sheet). New hazard classification, new H and P statements, ecotoxicology data for the substitute. The substitute may have different transport classification. Issue under GHS / CLP for the relevant region (EU CLP, US OSHA HazCom, India MoEFCC, etc.).

3. New COA (Certificate of Analysis). Batch-specific test results for the substitute pigment grade: colour strength, particle size (D50), purity, moisture, ash, residue on 325 mesh.

4. Updated REACH compliance declaration. Confirms the substitute is registered (or exempt as polymer/inorganic), no SVHC content above 0.1 percent.

5. 24-amines-free certificate if the substitute is an azo grade, with EN ISO 14362 test results from the certified manufacturing batch.

6. RoHS declaration for the substitute confirming no detectable lead, cadmium, mercury, or hexavalent chromium above the 0.01 / 0.1 percent thresholds.

7. Customer notification letter. Written communication to downstream customers describing the substitution, the regulatory driver, the technical equivalence, and the documentation update. Preserve the substitute’s qualification status for OEM-spec applications. Some OEM specifications require formal change-control approval before a pigment substitution is accepted; check the customer’s quality manual.

For toy and cosmetic applications, expect the downstream brand to require a fresh migration test (toy) or a fresh dermal toxicology dossier (cosmetic) before accepting the substituted formulation. Plan four to eight weeks for that test cycle on a typical toy substrate.

Kanani’s REACH-safe portfolio

Every grade in the Kanani Pigment & Paste portfolio (38 grades across yellows, oranges, reds, magentas, violets, blues, greens, and specialty shades) is built on REACH-compliant chemistry. Specifically:

• Zero lead, cadmium, mercury, or hexavalent chromium content. All grades are organic chemistries (azo, benzimidazolone, quinacridone, DPP, phthalocyanine, anthraquinone, isoindolinone) with no inorganic heavy-metal content above analytical detection limits.
• All azo grades pass EN ISO 14362 at the 30 mg/kg threshold for the 24 banned aromatic amines. Per-shipment 24-amines-free certificates ship with every consignment.
• Full compliance dossier per shipment: SDS (GHS), COA (batch-specific), REACH compliance declaration, RoHS declaration, 24-amines-free certificate where applicable.
• Country-specific certifications on request: NSF for potable water contact, FDA / EU 10/2011 for food contact, IS for India, SASO for Saudi Arabia, INMETRO for Brazil.
• Substitution match service. Send a legacy standard plus application requirements; we ship a 50 to 100 g substitution sample with delta E data versus the standard within 2 to 3 business days.

For background on quality systems and compliance documentation, see Quality, Sustainability, and the India Markets page for the BIS framework and Indian export compliance documentation.

The substitution conversation usually starts with a single legacy pigment but rarely ends there. Most formulators discover during the project that two or three other grades in their portfolio are also legacy lead, cadmium, or uncertified-azo and need migration. Plan the substitution as a portfolio review, not a single-pigment swap, and the regulatory and commercial value of the project compounds.

Recommended Grades from Kanani Pigment & Paste

The following Kanani Pigment & Paste grades are commonly specified in the contexts described in this guide. Click any product for full technical specifications, datasheets, and to request a free 50-100g evaluation sample.

• PY154: Premium PY154 replacement for banned PY34 lead chromate.
• PR170: PR170 replacement for cadmium-red PR108.
• PY83: Diarylide HR yellow replacement for legacy PY13 in masterbatch.

For grade selection guidance specific to your binder system, processing temperature, or compliance requirements, contact our technical sales team at [email protected] or +91 76008 95971.