A sunscreen can pass early lab screening and still feel too heavy once the UV filter system is pushed harder. The oil phase gets crowded, texture starts to drift, and UVA targets become awkward to hold. For sun care formulators, a water soluble UVA filter is useful because it moves part of the protection work into the water phase instead of asking the oil phase to do everything.
Why Water-Phase UVA Support Matters
Daily sunscreen projects now ask for a lot at once: high protection, lighter skin feel, stable emulsions, and cleaner ingredient logic. That combination is hard to reach when every major UV filter competes for the same oil-phase space.
A water-phase filter changes the conversation. It gives the formulator another place to build UVA support, which can be especially valuable in lotions, fluids, face care sunscreens, and day creams where after-feel is part of the product promise.
UVA Protection Creates a Different Challenge
UVA performance deserves its own planning because it is not the same problem as raising SPF. UVA radiation reaches deeper into skin than UVB and is tied closely to photoaging concerns, so the filter system must do more than prevent quick erythema.
A good sunscreen brief usually looks at UVA-I and UVA-II balance, photostability, sensory feel, and phase compatibility together. When one filter contributes from the water phase, the rest of the system often becomes easier to organize.
How BFP-SP TDSA Supports Formulators
When a team is solving for water-phase UVA support, the question is not simply whether an ingredient is fashionable. The useful question is how its form, spectrum, stability, and pairing logic fit the formula being developed.
BFP-SP TDSA is a water soluble, odorless, pale yellow solution used as a UVA filter in sunscreen formulations. Terephthalylidene dicamphor sulfonic acid is also known as TDSA, Ecamsule, or Mexoryl SX.
BFP-SP TDSA has CAS number 90457-82-2, molecular formula C28H34O8S2, molecular weight 562 g/mol, and an assay range of 30.0% to 34.0%. Its UV identity spectrum in ethanol is 342 to 346 nm, which fits its role in water-phase UVA protection.
Water Solubility Gives the Formula More Room
Water solubility matters because sunscreens are emulsions, not ingredient wish lists. Phase placement affects texture, stability, process handling, and how easily other filters can be combined without crowding one side of the formula.
BFP-SP TDSA helps balance protection between water and oil phases. It is a practical option for lightweight sun care concepts where the brand wants UVA support without making the oil phase carry the full burden.
| Decision point | Why it matters | BFP-SP TDSA relevance |
| Phase placement | Oil phase can become crowded in high-protection formulas | Water soluble UVA filter for aqueous-phase support |
| Protection role | Daily sun care needs durable UVA coverage | Reliable UVAII-to-UVAI coverage and photostability |
| Pairing logic | Broad-spectrum formulas usually need multiple filters | Compatible with common sunscreen ingredients and DHHB |
| Commercial check | Scale-up needs practical handling facts | Pale yellow solution, 2-year shelf life, cool dry storage |
Pairing TDSA With the Rest of the Filter System
TDSA works best as part of a planned UV filter system. It does not replace the need for UVB coverage, oil-phase UVA support, emulsion design, sensory adjustment, and regional compliance checks for the finished product.
BFP-SP TDSA is compatible with commonly used sunscreen ingredients and can enhance UVA protection with BFP-SP DHHB. That pairing is useful when a formula needs a stronger UVA profile while still preserving a light, manageable structure.
Checks Before a Buyer Moves Beyond Samples
The qualification step should connect the R&D bench with the purchasing decision. Before placing a bulk order, the team should know what TDSA is expected to do in the total filter package and how the finished formula performs after stability and sensory checks.
- Confirm the target format, such as lotion, cream, fluid, day cream, or face care sunscreen.
- Map which filters carry UVA-I, UVA-II, and UVB protection before adjusting dosage.
- Check pH, emulsion stability, appearance, odor, and skin feel after adding the water-phase filter.
- Review storage, shelf life, sample requirements, and quality documents before moving from trial to purchase.
Supplier Fit for Sun Care Ingredient Buyers
A supplier is more useful when it can discuss the whole sunscreen ingredient system, not only one molecule. Shanghai BFP focuses on anti-aging raw materials for sun care and cosmetics, with product lines covering organic UV filters, mineral UV filters, dispersive liquids, whitening powders, and related raw materials.
For buyers comparing organic UV filters for sunscreen, BFP-SP TDSA sits beside BFP-SP DHHB, BFP-SP EHT, BFP-SP OMC, BFP-SP OCT, BFP-SP AVB, BFP-SP OS, BFP-SP HMS, and BFP-SP PBSA. That range helps purchasing and R&D teams discuss complementary filter packages from one product family.
Shanghai BFP works with production sites in Tianjin, Shandong, Jiangsu, and Hubei, located in chemical parks with clean workshops. Some facilities are GMP certified, and product support is backed by laboratory equipment plus professional R&D and QC teams.
Summary for TDSA Selection
TDSA is a strong candidate when a sunscreen project needs photostable UVA support in the water phase. BFP-SP TDSA helps formulators balance water- and oil-phase protection, support lightweight textures, and pair UVA strategy with filters such as DHHB while staying focused on real sun care formulation needs.
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FAQ는
What is TDSA in sunscreen formulation?
TDSA is Terephthalylidene dicamphor sulfonic acid, also known as Ecamsule or Mexoryl SX. In sunscreen formulation, it is used as a water soluble UVA filter that supports UVA protection in the water phase.
Is BFP-SP TDSA oil soluble or water soluble?
BFP-SP TDSA is water soluble. That property lets formulators place UVA support in the aqueous phase instead of relying only on oil-soluble UV filters.
Can TDSA be combined with DHHB?
TDSA can be used with other sunscreen ingredients, and BFP-SP TDSA is positioned to enhance UVA protection with BFP-SP DHHB. The final combination still needs formula-level stability and performance testing.
What sunscreen formats can use TDSA?
TDSA is relevant for lightweight sunscreens, daily sun care, lotions, creams, fluids, and face care products where water-phase UVA support and comfortable skin feel are part of the product brief.
What should buyers confirm before ordering BFP-SP TDSA?
Buyers should confirm the finished product format, target market, desired UVA and UVB profile, compatibility requirements, sample quantity, quality documents, storage conditions, and shelf-life expectations before moving to bulk purchasing.