Sodium bicarbonate CAS#144-55-8

Stable Physical Form: Appears as white powder or fine monoclinic crystals, odorless with a mild salty taste for easy handling.

Controlled Thermal Decomposition: Gradually decomposes above 50°C and fully breaks down at 270°C into safe by-products such as sodium carbonate, CO₂, and water.

Mild Alkalinity in Solution: Acts as a weakly alkaline acidic salt, making it suitable for controlled chemical and food applications.

Effective Leavening Function: Widely used as a food leavening agent due to its ability to release carbon dioxide during reactions.

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Products Description of Sodium bicarbonate CAS#144-55-8

Sodium bicarbonate, also commonly referred to as baking soda (sometimes confused with sodium carbonate and caustic soda), appears as a white powder or opaque fine monoclinic crystal. It is odourless with a saline taste, and its water solubility is lower than that of sodium carbonate. When heated above 50 °C, the solid gradually decomposes into sodium carbonate, carbon dioxide and water, achieving full decomposition at 270 °C. As an acid salt yielded from the neutralization reaction between a strong base and a weak acid, sodium bicarbonate displays weak alkalinity upon dissolution in water. This characteristic makes it widely adopted as a leavening agent in food processing. Sodium carbonate remains as a residue after its reaction; excessive dosage may impart an alkaline off-flavour to final food products.

Sodium bicarbonate Chemical Properties

Melting point	>300 °C(lit.)
Boiling point	851°C
density	2.16 g/mL at 25 °C (lit.)
bulk density	1000kg/m3
refractive index	1.5
storage temp.	2-8°C
solubility	H2O: 1 M at 20 °C, clear, colorless
form	solution (7.5%)
color	White
Specific Gravity	2.159
PH Range	7.8 - 8.2
pka	(1) 6.37, (2) 10.25 (carbonic (at 25℃)
PH	8.27(1 mM solution);8.22(10 mM solution);8.02(100 mM solution);
Odor	Odorless
Water Solubility	9 g/100 mL (20 ºC)
Decomposition	50 °C
Merck	148583
BRN	4153970
BCS Class	1
Stability:	Stable.
LogP	-4.010 (est)
CAS DataBase Reference	144-55-8(CAS DataBase Reference)
EPA Substance Registry System	Sodium bicarbonate (144-55-8)
Safety Statements	24/25
WGK Germany	1
RTECS	VZ0950000
TSCA	Yes
HS Code	28363000
Hazardous Substances Data	144-55-8(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 4220 mg/kg

Product Applications

Food-grade sodium bicarbonate (E500(ii)) is a multi-functional ingredient complying with FCC-V and USP-NF specifications:

① Bakery Leavening: Drives dough expansion with a leavening rate of no less than 65 % in accordance with GB 1886.22, delivering aluminiumfree safety performance.

② Acid-base Adjustment: Works as a pH-modifying agent to stabilize beverage pH within the 7.0-8.5 range (FDA 21 CFR 184.1736).

③ Food Processing: Applied as a meat tenderizer and vegetable preservative, meeting ISO 22000 HACCP requirements.

④ Cleaning Uses: Acts as an ECOCERT-approved degreasing agent for food-processing equipment (NSF HT1 registered).