What is Ammonium Bicarbonate CAS 1066-33-7?

Ammonium Bicarbonate, also called ammonium hydrogen carbonate, has the molecular formula NH4HCO3, CAS number 1066-33-7 and EINECS number 213-911-5. It is a white crystalline solid with a mild ammonia odor and is supplied as food grade E503ii or technical grade.

How does Ammonium Bicarbonate work as a leavening agent?

When heated above about 36 C, Ammonium Bicarbonate decomposes into ammonia, carbon dioxide and water vapor. This heat-only reaction is useful in thin, low-moisture baked products such as crackers, cookies and biscuits because the gases can escape during baking and leave little alkaline residue.

How is Ammonium Bicarbonate different from Sodium Bicarbonate?

Sodium bicarbonate generally requires an acid to release carbon dioxide, while ammonium bicarbonate is activated by heat alone and decomposes into gases. Ammonium bicarbonate is preferred for thin baked products where a clean, crisp texture is needed and no sodium-based residue is desired, but it is not ideal for thick products that may retain ammonia odor.

What are the main non-food applications of Ammonium Bicarbonate?

Technical-grade Ammonium Bicarbonate is used as a nitrogen source in agriculture and some fermentation processes, and as a foaming agent or chemical reagent in plastics, rubber, ceramics and dyeing. It is also used in dry-powder fire-extinguishing compounds and selected industrial pH-adjustment applications.

What should be checked when selecting food-grade Ammonium Bicarbonate?

For food use, confirm that the material is E503ii grade and that assay, chloride, sulfate, non-volatile matter, iron, heavy metals, lead and arsenic meet the applicable food standard. Food-grade material should be fine enough for rapid and uniform decomposition in the intended baked product.

How should Ammonium Bicarbonate CAS 1066-33-7 be stored?

Store Ammonium Bicarbonate in a cool, dry, well-ventilated area away from heat, moisture and direct sunlight. Because decomposition begins above about 36 C and increases with humidity, the package should remain sealed and be protected from temperature excursions to reduce ammonia loss and caking.

Ammonium Bicarbonate CAS 1066-33-7

Ammonium Bicarbonate, identified by CAS 1066-33-7, is an inorganic crystalline compound characterized by its rapid thermal decomposition into gaseous components. As a versatile ammonium bicarbonate, this technical-grade acid ammonium carbonate functions as a primary blowing agent and leavening constituent in various industrial foaming agent formulation processes. This crystalline ammonium hydrogen carbonate is valued in the plastics and rubber industries for its ability to create uniform cellular structures during the expansion phase without leaving solid residues. Our facility provides competitive factory pricing and customized specifications regarding particle size and anti-caking treatments to ensure optimal stability during storage and transport. For procurement and technical validation, we offer comprehensive MSDS, TDS, COA documentation and maintain consistent bulk supply for large-scale industrial manufacturing.

CAS: 1066-33-7
Synonyms: Ammonium hydrogen carbonate, Acid ammonium carbonate, Carbonic acid monoammonium salt, Ammonium acid carbonate
Einecs: 213-911-5
Molecular Formula: NH4HCO3
Grade: Food Grade (E503ii) / Technical Grade
Package: 25kg Plastic woven bag (PP) with double PE liner to prevent volatilization.

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Product Description

Ammonium Bicarbonate is an inorganic compound that acts as a chemical leavening agent. Unlike Baking Soda (Sodium Bicarbonate), it does not require an acidic ingredient to activate. It reacts solely to heat.

Mechanism: When the dough temperature reaches above 35°C (and rapidly at 60°C), it breaks down into Ammonia gas ( $N H_{3}$ NH3), Carbon Dioxide ( $C O_{2}$ CO2), and Water vapor.

Why choose our AmBic?

No Residual Taste: Since it decomposes completely into gases, it does not leave a soapy or salty aftertaste (like sodium carbonate) provided the product is baked dry.
Texture Control: It creates a very specific, porous, and crisp texture that is ideal for thin crackers and cookies.
Low Heavy Metals: Produced via the carbonization of ammonia water, our process ensures extremely low heavy metal content, complying with EU and FDA regulations.

1 Physicochemical Properties

2 Applications

3 Storage Conditions (Critical)

4 Safety Precautions

Physicochemical Properties

The following data is typical of our Food Grade export batch.

Parameter	Specification (Standard GB 1888 / FCC)
Appearance	White crystalline powder
Assay (NH4HCO3)	99.2% – 100.5%
Chloride (Cl)	≤ 30 ppm
Sulfate (SO4)	≤ 70 ppm
Non-volatile Matter	≤ 0.05%
Iron (Fe)	≤ 20 ppm
Arsenic (As)	≤ 2 ppm
Lead (Pb)	≤ 2 ppm
Heavy Metals (as Pb)	≤ 5 ppm
Solubility	Soluble in water (approx. 17g/100ml at 20°C)

Applications

Bakery (Specific Use):
- Ideal for: Crackers, thin cookies, puff pastry, and cream puffs.
- Note: It is not recommended for moist, thick cakes (like sponge cake or muffins) because the ammonia gas cannot escape efficiently, which may leave an unpleasant smell in the crumb.
Foaming Agent:
- Used in the rubber and plastic industry to create porous structures (e.g., shoe soles) due to its gas-releasing property.
Ceramics:
- Used as an additive in ceramic production to increase porosity.
Flame Retardant:
- Used in some fire-extinguishing compositions.

For formulations specified with sodium rather than ammonium bicarbonate, see Sodium Bicarbonate.

Storage Conditions (Critical)

Volatile Nature: Ammonium Bicarbonate is unstable. It slowly decomposes at room temperature and decomposes rapidly at temperatures above 35°C.
Temperature: Must be stored in a cool place (below 20°C is best). If stored in a hot warehouse during summer, the product will degrade, the bags may bloat (puff up) due to gas release, and actual product weight will decrease.
Sealing: Keep the inner PE bag strictly sealed. Exposure to air causes it to evaporate.
Ventilation: The storage area should be well-ventilated to prevent the accumulation of ammonia fumes.

Safety Precautions

Odor: The product releases ammonia gas, which has a pungent, suffocating odor.
Inhalation: Inhaling the dust or vapors can irritate the nose and throat. Workers should wear a mask and work in ventilated areas.
Skin/Eye Contact: Can cause mild irritation. Rinse thoroughly with water if contact occurs.
Transport: It is generally not classified as Dangerous Goods (Non-DG) for transport, but carriers should be aware of the potential ammonia smell if the packaging is damaged.

FAQ - Technical & Supply Chain

Q:
What is Ammonium Bicarbonate CAS 1066-33-7?

A: Ammonium Bicarbonate, also called ammonium hydrogen carbonate, has the molecular formula NH4HCO3, CAS number 1066-33-7 and EINECS number 213-911-5. It is a white crystalline solid with a mild ammonia odor and is supplied as food grade E503ii or technical grade.
Q:
How does Ammonium Bicarbonate work as a leavening agent?

A: When heated above about 36 C, Ammonium Bicarbonate decomposes into ammonia, carbon dioxide and water vapor. This heat-only reaction is useful in thin, low-moisture baked products such as crackers, cookies and biscuits because the gases can escape during baking and leave little alkaline residue.
Q:
How is Ammonium Bicarbonate different from Sodium Bicarbonate?

A: Sodium bicarbonate generally requires an acid to release carbon dioxide, while ammonium bicarbonate is activated by heat alone and decomposes into gases. Ammonium bicarbonate is preferred for thin baked products where a clean, crisp texture is needed and no sodium-based residue is desired, but it is not ideal for thick products that may retain ammonia odor.
Q:
What are the main non-food applications of Ammonium Bicarbonate?

A: Technical-grade Ammonium Bicarbonate is used as a nitrogen source in agriculture and some fermentation processes, and as a foaming agent or chemical reagent in plastics, rubber, ceramics and dyeing. It is also used in dry-powder fire-extinguishing compounds and selected industrial pH-adjustment applications.
Q:
What should be checked when selecting food-grade Ammonium Bicarbonate?

A: For food use, confirm that the material is E503ii grade and that assay, chloride, sulfate, non-volatile matter, iron, heavy metals, lead and arsenic meet the applicable food standard. Food-grade material should be fine enough for rapid and uniform decomposition in the intended baked product.
Q:
How should Ammonium Bicarbonate CAS 1066-33-7 be stored?

A: Store Ammonium Bicarbonate in a cool, dry, well-ventilated area away from heat, moisture and direct sunlight. Because decomposition begins above about 36 C and increases with humidity, the package should remain sealed and be protected from temperature excursions to reduce ammonia loss and caking.

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