What is Sodium Saccharin?
Sodium saccharin, chemically known as the sodium salt of o-benzoic sulfimide, is a synthetic, non-nutritive sweetener widely used in the food industry. Its E number is E954, and its CAS numbers are 128-44-9 (anhydrous) and 6155-57-3 (dihydrate). First discovered in 1879, sodium saccharin is one of the earliest artificial sweeteners and has been in use for over 140 years.
Chemically, it consists of a benzene ring fused with a five-membered ring containing nitrogen, sulfur, and oxygen atoms, and is bonded to a sodium ion. This unique structure gives it an intensely sweet taste.
Sodium saccharin appears as a white crystalline powder, odorless or with a faint aromatic smell. It has a very sweet taste with a slight bitter. It dissolves easily in water, with a solubility of about 1g per 1.5ml at 20°C. Its sweetness is about 300–500 times that of sugar (typically calculated as 300×), with a taste threshold around 0.00048%. Note that at concentrations above 0.026%, it can taste bitter, and its sweetness may fade when heated in acidic conditions.
As a food additive, sodium saccharin provides no nutritional value—it simply imparts a sweet sensation. Consuming excessive sodium saccharin may affect digestive enzymes and reduce appetite, so its use in foods must be carefully controlled.
How Sodium Saccharin Works
The strong sweetness of sodium saccharin comes from how its molecules interact with sweet taste receptors on the tongue. This triggers nerve signals that the brain perceives as sweet. The mechanism is similar to natural sweeteners like sugar, but saccharin binds more effectively, so very small amounts are needed.
Its intense sweetness is its key feature—1 gram can replace 300–500 grams of sugar in dilute solutions. This makes it valuable for reducing sugar in foods.
Unlike sugar, sodium saccharin is not metabolized by the body. It is absorbed, then largely excreted unchanged in urine, without providing calories. This makes it suitable for diabetics and those managing weight.
It is also stable under normal conditions, though its sweetness may decrease over time in solution. Heating in acidic environments can break it down, causing loss of sweetness.
Applications in the Food Industry
Sodium saccharin is used in many foods, including beverages, preserved fruits, pastries, and condiments. Regulations strictly limit the maximum amount allowed in each food type.
In beverages, it is a common sweetener. For example, the U.S. FDA limits sodium saccharin to no more than 12 mg per fluid ounce in drinks and juice beverages. For highly sweetened juices, the amount is calculated based on 80% of the dilution factor.
It is also widely used in preserved fruits, which often require high sweetness to balance tartness. Other applications include pickles, composite seasonings, ice cream, frozen treats, cakes, cookies, and bread.
Beyond food, it is used in pharmaceuticals (as a flavor enhancer), oral care products like toothpaste, and as a feed additive for livestock.
Production Process
Producing sodium saccharin involves several chemical steps:
1. Methyl anthranilate is prepared from phthalic anhydride and ammonia.
2. Diazotization and substitution reactions convert it into methyl o-sulfobenzoate.
3. Chlorination and cyclization form saccharin ammonium salt.
4. Acidification and neutralization yield soluble sodium saccharin, which is then concentrated, crystallized, and dried.
Modern production uses automated, continuous systems with strict control over temperature, pressure, and pH. Waste treatment is also essential to minimize environmental impact.
Safety Evaluation
The safety of sodium saccharin has been thoroughly studied. In November 2024, the European Food Safety Authority (EFSA) reassessed it and confirmed its safety at recommended intake levels. EFSA set an Acceptable Daily Intake (ADI) of 9 mg per kg of body weight (as free saccharin), higher than the previous 5 mg/kg.
EFSA concluded that sodium saccharin does not damage DNA and does not increase cancer risk under normal use. Earlier concerns about bladder cancer were based on high-dose animal studies not applicable to humans. Other authorities like the U.S. FDA and WHO also consider it safe when used appropriately.
Consumers are still advised to avoid excessive intake, especially pregnant women, nursing mothers, and children.
Comparison with Other Sweeteners
Common sweeteners include sugar, aspartame, sucralose, and stevia. Here’s how saccharin compares:
– Sweetness: Saccharin is 300–500× sweeter than sugar; aspartame ~200×; sucralose ~600×; stevia ~200–300×.
– Calories: Saccharin, aspartame, sucralose, and stevia provide no calories; sugar has about 4 kcal/gram.
– Stability: Saccharin is stable at room temperature but breaks down in acidic heat. Aspartame is heat-sensitive; sucralose is heat-stable; stevia is stable but may change in alkaline conditions.
– Cost: Saccharin is one of the most affordable sweeteners. Aspartame and sucralose are more expensive; stevia varies by purity.
– Uses: Saccharin is used in many foods but banned in infant foods. Others have broader or more “natural” appeal.
Frequently Asked Questions
1. Does sodium saccharin cause cancer?
No. Leading health authorities agree it is safe at recommended levels. Earlier animal studies used extremely high doses not relevant to human consumption.
2. Does it have any nutritional value?
No. It only adds sweetness without vitamins, minerals, or energy.
3. How is it different from sugar?
Sugar is natural and provides energy; saccharin is synthetic, calorie-free, and much sweeter, but can taste bitter at high concentrations.
4. Which foods contain sodium saccharin?
Drinks, preserved fruits, pickles, baked goods, ice cream, and more. Check ingredient labels if concerned.
5. Is it safe for pregnant women and children?
While considered safe, it’s wise for these groups to limit intake and focus on a balanced, natural diet.
6. What is the safe daily intake?
EFSA’s ADI is 9 mg/kg body weight. For a 60 kg adult, that’s up to 540 mg daily—far more than typical dietary intake.
Sodium Saccharin from Sinoright
Sinoright, founded in 2011 and based in Dalian, China, is a trusted supplier of food-grade sodium saccharin. Their product meets GB 1886.18-2015, USP, BP, and EP standards.
Product features:
– High purity (≥99.0%)
– Consistent quality
– Various particle sizes available (8-12 mesh, 20-40 mesh, etc.)
Company strengths:
1. Competitive pricing as a direct supplier.
2. Strong supply chain with reliable bulk availability.
3. Professional support and sample service.
4. International certifications (ISO9001, KOSHER, HALAL).
If you’re sourcing sodium saccharin, Sinoright offers a reliable solution with quality products and attentive service.