Aspartame-Acesulfame Salt (INS 962): A Complete Guide to the High-Potency Sweetener
Answer Snapshot
- What it is: A 1:1 salt of aspartame and acesulfame potassium designed to deliver synergistic sweetness.
- Safety consensus: JECFA, EFSA, and FDA support use within the ADI of 0-10 mg/kg body weight/day.
- Common uses: Diet sodas, dairy desserts, sugar-free gum, tabletop sweeteners, and some lightly baked products.
- Blood sugar impact: It does not raise blood glucose or insulin at normal dietary use levels.
- Who should be careful: People with PKU should avoid it because the aspartame portion contributes phenylalanine.
- Label names / aliases: Aspartame-acesulfame salt and INS 962.
Quick Facts
| Attribute | Detail |
|---|---|
| Ingredient name | Aspartame-acesulfame salt |
| INS code | 962 |
| Functional class | High-intensity sweetener |
| Sweetness potency | About 350-400 times sweeter than sucrose |
| Caloric value | Theoretical 4 kcal/g, but negligible in practical use |
| ADI | 0-10 mg/kg body weight/day |
| Stability | Typically stable through pH 3.0-8.0 and short heating to about 160°C |
| Blood sugar impact | No meaningful glycemic effect |
| Typical label names | Aspartame-acesulfame salt, INS 962 |
What It Is
Aspartame-acesulfame salt is a combined sweetener made from aspartame and acesulfame potassium in a 1:1 molar ratio. It was developed to capture the sweetness advantages of both ingredients while improving taste balance and formulation efficiency.
The combination is important because it creates quantitative synergy: the blend can taste sweeter and more sugar-like than either component used alone at the same relative intensity. That is why it appears in many reduced-sugar beverage systems and flavored dairy products.
Safety
Global regulatory reviews from JECFA, EFSA, and the FDA support the use of aspartame-acesulfame salt within the ADI of 0-10 mg/kg body weight/day. Those reviews treat the ingredient as a well-characterized high-intensity sweetener with an established toxicological basis.
The principal caution is the same as for aspartame-containing products generally: the ingredient contributes phenylalanine, so people with PKU need to avoid it or follow label warnings carefully. For the broader population, current regulatory assessments support approved use levels.
Metabolism and Blood Sugar
The aspartame portion is digested into phenylalanine, aspartic acid, and methanol, while the acesulfame portion is largely excreted unchanged. Those different metabolic paths are part of why the ingredient can deliver sweetness without acting like a sugar load.
Because it is used in very small amounts and does not convert into glucose, it does not meaningfully raise blood sugar or insulin levels. That makes it a common option in products aimed at diabetes-friendly or low-carbohydrate positioning.
Stability
Aspartame-acesulfame salt is more heat tolerant than aspartame alone, but it is not a heavy-duty frying or prolonged high-heat sweetener. It is generally suitable for light baking and pasteurization, with partial breakdown becoming more likely above about 180°C.
Its pH stability range of roughly 3.0 to 8.0 makes it practical in both acidic beverages and neutral foods. That versatility is one reason it is used in diet sodas and chilled dairy applications.
Common Uses
This ingredient is commonly used in carbonated beverages, flavored waters, reduced-sugar dairy desserts, chewing gum, hard candy, and tabletop sweetener systems. Manufacturers may also use it in mild-heat bakery products where the processing conditions stay within its stability range.
It is especially useful when formulators want a clean sweetness profile without relying on a single sweetener that may have more obvious aftertaste.
Compare and Alternatives
Compared with aspartame alone, the salt form offers better taste balance and somewhat better process stability. Compared with acesulfame potassium alone, it usually gives a smoother sweetness profile. Compared with sucralose or some steviol glycoside systems, its main tradeoff is that it still inherits the phenylalanine issue from aspartame.
In practice, it sits between pure single-ingredient sweeteners and more complex sweetener systems: cleaner than many simple blends, but not as heat-robust as the strongest baking-focused options.
Official References
- FAO/WHO Codex Alimentarius: Search for INS 962 in the Global Standard for Food Additives (GSFA) database: GSFA Online Search
- JECFA Evaluation: Joint FAO/WHO Expert Committee on Food Additives 72nd Meeting Report (2009), which includes the full safety assessment of aspartame-acesulfame salt.
- FDA Approval: FDA Food Additive Status List (search for "aspartame-acesulfame salt")
The information provided in this article is for educational and informational purposes only and is not intended as medical advice. Individuals with PKU or other specific dietary concerns should consult a qualified healthcare provider.