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SEMITI NANO-30 vs Kobo TTO-S-3

SEMITI NANO-30 matches Kobo TTO-S-3's reference performance for transparent UV protection in cosmetic sunscreens.

Kobo TTO-S-3 is widely cited as the cosmetic R&D reference for micronized rutile TiO2 — hydrophobic-coated, < 100 nm primary particle, transparent on skin, deactivated photocatalysis. SEMITI NANO-30 is positioned as the direct technical alternative.

Side-by-side specification

Typical published specs for the two grades. Customer-specific CoA on inquiry.

PropertySEMITI NANO-30Kobo TTO-S-3
Primary particle size15–30 nm10–50 nm
Surface coatingSiO2 + organosilaneSiO2 + organosilane
SPF contribution (8% loading)30–3530–35
Photocatalytic activity< 5% of uncoated< 5% of uncoated
Landed cost50–60% lowerReference

Bold amber indicates the column with the stronger value on that line.

When to choose which

Choose
SEMITI NANO-30
  • →Mid-tier sunscreen brand cost-optimization
  • →Asia-Pacific cosmetic formulator with direct sourcing capability
  • →Reef-safe sunscreen product lines
Choose
Kobo TTO-S-3
  • →Premium US/EU sunscreen brand with established Kobo qualification
  • →Specialty pharmaceutical sunscreen with tight regulatory qualification

Drop-in substitution

Pre-disperse SEMITI NANO-30 in caprylic/capric triglyceride at 30–40%. SPF testing (Diffey in vitro initially, in vivo ISO 24444 for label claims) is essential. Typical qualification 4–8 weeks.

Pricing context

Kobo TTO-S-3 commands premium pricing (USD 30+ per kg). SEMITI NANO-30 lands at USD 12–18 per kg. The cost gap is meaningful for high-volume sunscreen production.

Bottom line

For mid-market and Asia-Pacific cosmetic brands, SEMITI NANO-30 delivers matched performance at half the cost.

Full SEMITI NANO-30 details

nano · sulfate
SEMITI NANO-30
Nano TiO2 (UV Filter Grade)

Hydrophobic surface-coated nano TiO2 (15–30 nm) for transparent UV protection in sunscreens and BB creams.

Full TDS, specifications, dosage →

Common questions

Can SEMITI NANO-30 substitute Kobo TTO-S-3 in a sunscreen formulation?+
Yes — pre-disperse SEMITI NANO-30 in caprylic/capric triglyceride at 30–40% before incorporating into the emulsion oil phase. Both deliver SPF 30–35 at 8% loading with photocatalytic activity < 5% of uncoated TiO2. Run SPF testing (Diffey in vitro, then ISO 24444 in vivo for label claims). Typical qualification: 4–8 weeks.
How much cheaper is SEMITI NANO-30 vs Kobo TTO-S-3?+
Kobo TTO-S-3 commands premium pricing at USD 30+/kg. SEMITI NANO-30 lands at USD 12–18/kg — a 50–60% cost reduction. For high-volume sunscreen production, this savings is highly material to margin.
When should I keep using Kobo TTO-S-3 rather than switching?+
Keep TTO-S-3 when your brand has an established US/EU Kobo qualification that customers or regulators expect, or when your sunscreen is a premium pharmaceutical-grade product with tight regulatory qualification requirements. For mid-tier and Asia-Pacific cosmetic brands without a Kobo lock-in, SEMITI NANO-30 delivers matched SPF performance at half the cost.

Request SEMITI NANO-30 sample for Kobo TTO-S-3 substitution trial

Free 25 kg sample for technical evaluation. We typically respond within 24 hours UTC+8. FOB / CIF / DDP terms available to most ports worldwide.

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