Synthetic cooling agents have revolutionized the food, beverage, and cosmetic industries by providing precise cooling sensations without the minty taste of traditional menthol. Understanding the differences between cooling agent powders — particularly WS-3, WS-23, WS-5, and WS-12 — is essential for product developers seeking the optimal cooling profile.
WS-23: Front-of-Mouth Cooling
WS-23 (CAS 51115-67-4) delivers a sharp, intense cooling sensation that bursts in the front of the mouth and on the tongue. It has strong initial impact with a relatively short duration (5-10 minutes). WS-23 is the most popular cooling agent for e-liquid and beverage applications due to its excellent solubility in propylene glycol (30%) and neutral flavor profile.
WS-3: Throat and Back-of-Tongue Cooling
WS-3 (CAS 39711-79-0) provides a cooling sensation that is more concentrated in the throat and back of the tongue. The onset is slightly slower than WS-23, but the cooling lasts longer (10-15 minutes). WS-3 has a mild menthol undertone, though much less than natural menthol. It is commonly used in confectionery, chewing gum, and oral care products.
WS-5: Long-Lasting, Strong Cooling
WS-5 (CAS 150178-47-1) is one of the strongest synthetic cooling agents available. It primarily affects the roof of the mouth and the back of the tongue. The cooling is smooth, well-rounded, and exceptionally long-lasting (15-25 minutes). WS-5 is derived from menthol but is virtually odorless and tasteless. Recommended dosage: 0.5-1.5%.
WS-12: Balanced, Synergistic Cooling
WS-12 (CAS 68489-09-8) offers a balanced cooling profile that fills the entire mouth smoothly. It is 1.5 times stronger than menthol and lasts 10-20 minutes. WS-12 is particularly valued for its synergistic effects — when combined with WS-23 or WS-3, it enhances and prolongs the overall cooling experience.
Comparison Table
| Agent | CAS | Cooling Location | Duration | PG Solubility |
|---|---|---|---|---|
| WS-23 | 51115-67-4 | Front of mouth | 5-10 min | 30% |
| WS-3 | 39711-79-0 | Throat | 10-15 min | 10% |
| WS-5 | 150178-47-1 | Roof of mouth | 15-25 min | Low |
| WS-12 | 68489-09-8 | Whole mouth | 10-20 min | Low |
Recommended Blending Strategies
- WS-23 + WS-3 (3:1): Front burst + throat cooling for e-liquids
- WS-23 + WS-12 (2:1): Intense initial + extended for beverages
- WS-3 + WS-5 (1:1): Moderate onset + very long for confectionery
Safety and Regulatory
All four cooling agents are approved for food and cosmetic use. Xi’an Taima’s cooling agents are USP grade with 99%+ purity, verified by HPLC testing. Full COA and MSDS documentation provided. Contact us for free samples.