Sodium Bicarbonate USP Grade 1, 50 lb Bag
Arm & Hammer Powdered Sodium Bicarbonate from Church & Dwight
Sodium Bicarbonate USP Grade 1 is a powdered form of sodium bicarbonate manufactured by Church & Dwight under the Arm & Hammer brand and supplied by Ingredi in a bulk 50 lb bag.
Also known as baking soda, bicarbonate of soda, and sodium hydrogen carbonate, sodium bicarbonate has the chemical formula NaHCO3 and CAS Number 144-55-8. The manufacturer's specification identifies Grade 1 as a white crystalline powder with a slightly alkaline taste and an approximate pH of 8.3 in a 1% aqueous solution at 77°F.
Church & Dwight specifies Sodium Bicarbonate USP Grade 1 at 99.0% to 100.5% NaHCO3 on a dried basis under the United States Pharmacopeia specification. The same manufacturer specification also includes Food Chemicals Codex criteria covering assay, loss on drying, lead, identification, insoluble substances, and ammonia.
Key Product Information
- Product: Sodium Bicarbonate USP Grade 1
- Brand: Arm & Hammer
- Manufacturer: Church & Dwight Co., Inc.
- Package Size: 50 lb bag
- Form: Powdered
- Chemical Formula: NaHCO3
- CAS Number: 144-55-8
- Alternate Names: Baking Soda, Bicarbonate of Soda, Sodium Hydrogen Carbonate
- USP Assay: 99.0% to 100.5% NaHCO3 on a dried basis
- Approximate pH: 8.3 at 1% in water at 77°F
- Molecular Weight: 84.01
- E Number: E-500(ii)
USP Grade 1 Specification
| Property |
Specification |
| Assay, Dry Basis |
99.0% to 100.5% NaHCO3 |
| Loss on Drying |
Not more than 0.25% |
| Chloride |
Not more than 0.015% |
| Sulfur Compounds |
Not more than 0.015% |
| Arsenic |
Not more than 2 ppm |
| Heavy Metals |
Not more than 5 ppm |
| Insoluble Substances |
1 g in 20 mL water produces a complete, clear solution |
| Normal Carbonate |
Meets test |
| Ammonia |
Meets requirements |
| Residual Solvents |
Meets requirements |
Food Chemicals Codex Criteria
The Church & Dwight specification also provides Food Chemicals Codex criteria for Sodium Bicarbonate USP Grade 1, including:
- At least 99% NaHCO3 after drying
- Loss on drying not greater than 0.25%
- Lead not greater than 2 mg/kg
- Positive identification for sodium and bicarbonate
- Insoluble substances test passed
- Ammonia test passed
For applications with specific food, pharmaceutical, regulatory, or formulation requirements, review the current Certificate of Analysis and applicable manufacturer documentation for the lot being purchased.
Powdered Grade 1 Granulation
Grade 1 is identified as a powdered sodium bicarbonate with the following cumulative sieve-retention limits:
| U.S. Sieve Size |
Microns |
Minimum Retained |
Maximum Retained |
| 100 |
149 |
0% |
2% |
| 200 |
74 |
20% |
45% |
| 325 |
44 |
60% |
100% |
This particle-size distribution is one of the primary characteristics that distinguishes Grade 1 from coarser sodium bicarbonate grades and can affect handling, blending, dispersion, and dissolution in a formulation or process.
Typical Physical Properties
| Property |
Typical Value |
| Chemical Formula |
NaHCO3 |
| CAS Number |
144-55-8 |
| Molecular Weight |
84.01 |
| Appearance |
White crystalline powder |
| Taste |
Slightly alkaline |
| E Number |
E-500(ii) |
| Solubility in Water at 77°F |
Approximately 9.5% |
| Solubility in Alcohol |
Insoluble |
| pH, 1% Aqueous Solution at 77°F |
Approximately 8.3 |
| Carbon Dioxide Equivalent |
0.524 lb CO2 per lb NaHCO3 |
These values are identified by Church & Dwight as general properties and should not be treated as product specifications.
Certifications & Documentation
Ingredi maintains extensive manufacturer, regulatory, and compliance documentation for Sodium Bicarbonate USP Grade 1 to help customers evaluate the material for their purchasing and formulation requirements.
Available documentation can be found in the Manufacturer Information & Datasheets tab on this page.
Frequently Asked Questions
What is Sodium Bicarbonate USP Grade 1?
Sodium Bicarbonate USP Grade 1 is a powdered sodium bicarbonate manufactured by Church & Dwight under the Arm & Hammer brand. Its USP specification requires an assay of 99.0% to 100.5% NaHCO3 on a dried basis.
Is sodium bicarbonate the same as baking soda?
Yes. Baking soda is a common name for sodium bicarbonate. Other names include bicarbonate of soda and sodium hydrogen carbonate.
What does USP mean in Sodium Bicarbonate USP Grade 1?
USP refers to the United States Pharmacopeia. The Church & Dwight specification includes USP requirements for identity, assay, purity, loss on drying, insoluble substances, and other quality parameters.
What does Grade 1 mean for sodium bicarbonate?
Grade 1 is Church & Dwight's powdered sodium bicarbonate grade designation. The manufacturer defines it with a specific particle-size distribution using U.S. sieve sizes.
Is Sodium Bicarbonate Grade 1 powdered?
Yes. Grade 1 is identified by Church & Dwight as a powdered sodium bicarbonate.
What is the purity of Sodium Bicarbonate USP Grade 1?
The USP specification requires an assay of 99.0% to 100.5% NaHCO3 on a dried basis.
Is this a 50 lb bag of baking soda?
Yes. Sodium bicarbonate is commonly known as baking soda, and this product is supplied in a bulk 50 lb bag.
What is the difference between Sodium Bicarbonate Grade 1 and Grade 5?
The main documented difference is particle size. Grade 1 is powdered, while Grade 5 is a coarser granular sodium bicarbonate grade. Buyers should select the granulation appropriate for their processing, blending, handling, and formulation requirements.
What is the CAS number for sodium bicarbonate?
The CAS number is 144-55-8.
What is the pH of sodium bicarbonate?
The approximate pH is 8.3 for a 1% aqueous solution at 77°F.
Is sodium bicarbonate soluble in water?
Yes. Water solubility is approximately 9.5% at 77°F. The USP specification also requires 1 gram in 20 mL of water to produce a complete, clear solution.
Does this product have Halal and Kosher documentation?
Yes. Current Halal and Kosher certification documentation is available through Ingredi.
Is allergen and GMO documentation available?
Yes. Ingredi provides allergen and GMO statements along with additional manufacturer, regulatory, and compliance documentation.
Does Sodium Bicarbonate USP Grade 1 meet Food Chemicals Codex criteria?
The Church & Dwight specification includes Food Chemicals Codex criteria covering assay, loss on drying, lead, identification, insoluble substances, and ammonia. Buyers with specific regulatory or formulation requirements should review the current documentation for the lot being purchased.
