Cooling Agent WS-23 (N,2,3-Trimethyl-2-Isopropylbutanamide, CAS 51115-67-4) is a high-purity synthetic cooling agent that delivers a clean, fresh, mint-like cooling sensation — without the bitterness, odour or pungency of menthol. This page is a complete product detail and customs clearance sheet for international buyers and import agents: chemical identity, typical specifications (COA basis), physical properties, applications, dosage, packaging and the export documents shipped with every order.
WS-23 is a white crystalline powder with a melting point of 60–63 °C. It is almost insoluble in water but freely soluble in ethanol, propylene glycol, glycerin and oils — which makes it easy to dose and blend into food, beverage, confectionery, oral-care and cosmetic formulations. Sourced directly from ShaanXi ZhiYi Biotechnology Co., Ltd., it ships with full export documentation for smooth customs clearance worldwide.
Quick Reference — Product Identity
| Parameter | Value |
|---|---|
| Product Name | Cooling Agent WS-23 |
| Chemical Name | N,2,3-Trimethyl-2-Isopropylbutanamide |
| IUPAC Name | 2-Isopropyl-N,2,3-trimethylbutanamide |
| Synonyms | Koolada-23, Cooling Sensate WS 23, RightCool WS-23 |
| CAS Registry No. | 51115-67-4 |
| FEMA No. | 3804 |
| EINECS / ELINCS | 256-974-4 |
| Molecular Formula | C10H21NO |
| Molecular Weight | 171.28 g/mol |
| Appearance | White crystalline powder |
| Purity (GC) | ≥ 99.0% |
| Manufacturer | ShaanXi ZhiYi Biotechnology Co., Ltd., Xi’an, Shaanxi, China |
1. Physical & Chemical Properties
| Property | Specification |
|---|---|
| Appearance | White crystalline powder |
| Odour / Taste | Practically odourless; strong, clean, mint-like cooling sensation |
| Melting Point | 60 – 63 °C |
| Solubility | Almost insoluble in water; freely soluble in ethanol, propylene glycol, glycerin and oils/fats |
| Flash Point | > 100 °C (closed cup) |
| Stability | Stable under normal storage; thermally stable in food processing |
| Shelf Life | 24 months in original sealed packaging |
2. Typical Specifications (Certificate of Analysis Basis)
| Test Item | Specification |
|---|---|
| Assay (GC, area %) | ≥ 99.0% |
| Appearance | White crystalline powder, conforms to standard |
| Melting Point | 60 – 63 °C |
| Water Content (Karl Fischer) | ≤ 0.5% |
| Residue on Ignition | ≤ 0.1% |
| Heavy Metals (as Pb) | ≤ 10 mg/kg |
| Arsenic (As) | ≤ 2 mg/kg |
3. Product Functions & Applications
WS-23 is a physiological cooling agent: it activates the cold receptors (TRPM8) of the skin and mucous membranes to produce a genuine cooling sensation rather than a flavour illusion. It is the industry-standard coolant wherever a refreshing, icy effect is required — with or without a mint flavour. For a deeper look at how it compares to other WS grades, see our WS-23 buyer’s guide.
- Confectionery & Chewing Gum — hard candies, gummies, mints and sugar-free gum; strong, long-lasting cool burst.
- Beverages — soft drinks, flavoured water, energy drinks and dairy drinks; fresh, icy mouthfeel without mint flavour.
- Oral Care — toothpaste, mouthwash and breath strips; enhanced freshness and cleaning feel.
- Cosmetics & Personal Care — creams, lotions, aftershave, shampoo and body wash; gentle, non-irritating cooling.
- Baked & Processed Foods — thermally stable, survives baking and hot-fill processes.
- Pharmaceutical & Topical — cooling gels and external-use preparations needing a mild cooling effect.
4. Recommended Dosage
The typical usage level is 30 – 100 mg/kg, adjusted according to the desired cooling intensity and the product matrix. Start at the lower end for delicate flavour systems and increase gradually for high-impact cooling.
5. Packaging, Storage & Shelf Life
- Standard packing: 25 kg fiber drum with inner double PE bag.
- Sample / small volume: 1 kg aluminum foil bag with inner PE bag.
- Custom packing: available on request.
- Storage: cool, dry, well-ventilated area, away from direct sunlight and moisture; keep containers tightly closed.
- Shelf life: 24 months when stored as recommended.
- Handling: non-hazardous for transport; avoid dust inhalation and eye contact.
6. Customs & Shipping Documents
Every export order of WS-23 from ZHII includes the full document set required by import customs:
- Commercial Invoice
- Packing List
- Bill of Lading / Air Waybill
- Certificate of Analysis (COA)
- Material Safety Data Sheet (MSDS / SDS)
- Technical Data Sheet (TDS)
- Certificate of Origin (on request)
- Health Certificate (on request)
Reference HS Code: 2924.29 (other amides). Please confirm the applicable tariff classification with your customs broker. Transport status: not classified as dangerous goods (non-hazardous). MOQ: 1 kg — free evaluation samples available on request.
7. Why Source WS-23 from ZHII
- Factory-direct pricing — manufactured in our Xi’an facility, no middlemen.
- Certified quality — ISO 9001, ISO 14001, KOSHER and HALAL certified production.
- Full COA on every batch — GC purity, melting point, moisture and heavy metals documented per lot.
- Fast global shipping — stable inventory and logistics to 50+ countries.
- Technical support — 18+ years in flavours & fragrances; dosage and grade selection guidance.
Frequently Asked Questions
What is cooling agent WS-23 used for?
WS-23 (CAS 51115-67-4) is used as a flavourless, odourless cooling agent in food, beverages, confectionery, chewing gum, oral care and cosmetics. It delivers pure physical cooling without mint flavour, bitterness or tingling.
What is the difference between WS-23 and WS-3?
WS-3 (CAS 39711-79-0) has a slight fresh menthol note with fast onset, while WS-23 is completely odourless with a softer, longer, more rounded cooling effect. Many formulators blend both to balance speed and duration.
What documents do you provide for customs clearance?
We provide Commercial Invoice, Packing List, Bill of Lading / Air Waybill, COA, MSDS/SDS and TDS with every order; Certificate of Origin and Health Certificate are available on request.
Do you offer free samples?
Yes — free 10–50 g evaluation samples of WS-23 are available worldwide. You only cover the courier cost or provide your FedEx/DHL account number.
Need a quotation, sample or the full COA for WS-23? Contact us — English-speaking sales team, quote within 24 hours.