Fragrance Notes
CA Perfume
Changing Constance
Inspired by Penhaligon's · Format: EDP Spray
Safe for everyday use. This product is suitable for most adults in normal fragrance application.
Why This Score
Scores are calculated by HumanSafe™ — an independent third-party platform — using peer-reviewed toxicology sources, regulatory databases, and HumanSafe's Mood Architecture™.
Safety at a Glance
✅ Safe for
- —Daily topical use
- —Most healthy adults
- —Long-term skin contact
- —EDP leave-on format
⚠ Use with care if
- —Sensitive or reactive skin
- —Direct eye-area contact
✕ Avoid if
- —Broken or compromised skin
- —Children under 3 years
Full breakdown available to members. Join free →
Key Factors
Score DriversIngredients
28 Total| CAS No. | INCI Name | FUNCTION | ISS | Status |
|---|---|---|---|---|
| 64-17-5 | Ethanol | Solvent / Carrier | 7.0Poor | Moderate |
| 7732-18-5 | Aqua | Solvent / Carrier | 10.0 | Low Risk |
| 54464-57-2 | Tetramethyl Acetyloctahydronaphthalenes | Fragrance ingredient | 7.0B | Moderate |
| 1222-05-5 | Ambroxan | Fragrance ingredient | 7.0A- | Moderate |
| 105-95-3 | Ethylene Brassylate | Fragrance ingredient | 10.0A+ | Low Risk |
23 more ingredients in this formulation
See Full Ingredient List — Join Free →Ingredients sourced from MG Safety Data Sheet and EU Allergen Certificate. Formulation: fragrance oil 20% + Ethanol 65% + Aqua 15%. ⚑ = EU regulated allergen (Regulation EC 1223/2009). Note 1 = Annex II prohibited substance. Note 2 = commercial quality (includes both isomers).
Fragrance Mood Profile
MEI™ Mood ArchitectureIndex™
MEI™ scores are calculated by HumanSafe™ using HumanSafe's Mood Architecture™ — a 9-dimension olfactory-emotion mapping system. MEI is an intensity scale: 3/10 = subtle, 9/10 = immersive. Score reflects mood character, not safety.
Usage & Safety Guidance
Safer Alternatives
Higher PSS ScoreProducts with higher Product Safety Scores. Independently assessed by HumanSafe™.
Frequently Asked Questions
Is Changing Constance safe for daily use?+
Changing Constance carries a solid Grade A- PSS rating, suggesting suitability for regular use for most consumers. However, daily application of any fragrance should account for individual skin sensitivity. If you have a history of fragrance reactions or very sensitive skin, start with 2–3 days per week and observe for any irritation.
Are there any ingredients I should watch out for?+
The primary consideration is Tetramethyl Acetyloctahydronaphthalenes, a synthetic musk that makes up 30% of the formula. While rated as safe, synthetic musks can accumulate with heavy or prolonged use in some individuals. People with known fragrance sensitivities, pregnant women, or those with very reactive skin should consult a dermatologist before use.
What does a PSS of 7.2/10 (Grade A-) mean?+
The PSS (Product Safety Score) of 7.2/10 reflects an independent safety assessment of Changing Constance's ingredient profile and formulation. Grade A- indicates above-average safety for a fragrance product, with no critical red flags. This rating does not eliminate individual sensitivity; always perform a patch test first.
The HumanSafe™ Difference
Most safety tools rate ingredients in isolation — one score regardless of concentration, context, or how the product is used. We assess at actual use concentration.
| Dimension | Other Apps (EWG, Yuka) | HumanSafe™ |
|---|---|---|
| Dose awareness | Same score regardless of concentration | Assessed at actual use concentration in this product |
| Exposure context | Same score for rinse-off and leave-on products | Adjusted for product format and absorption rate |
| Allergens | Binary flag — present or absent | Concentration compared to IFRA/EU safe limits |
| Purchase signal | Score only, no recommendation | Clear verdict + safer alternatives ranked by PSS |
Version & Audit Trail
| Version | Date | PSS Score | ISS (avg) | Change Summary |
|---|---|---|---|---|
| v2.1.0 | April 2026 | 7.5 | — | Current assessment — PSS v4.1 route-weighted engine. Dose-aware scoring at actual use concentration. |