Buy Cas 6131-90-4 Sodium Acetate Trihydrate 58% Carbon Source Culture Bacteria

Product Specification

Key attributes

Chemical formula: CH3COONa·3H₂O,NaC2H3O2

CAS: 6131-90-4

Purity: 58%～60%`

Production standard:

References: Riel Chemical Lab1&2, National public service platform for standards information.

Chemical properties
Chemical formula: CH₃COONa

Molecular weight: 82.03 g/mol (anhydrous matter); 136.08 g/mol (trihydrate)

Structure: Composed of the radical acetate ion (CH₃COO⁻) and sodium ion (Na +).

pH value: The aqueous solution is weakly alkaline, pH is about 8-9.

Physical properties
Appearance:

Anhydrous sodium acetate: white crystalline powder.

Sodium acetate trihydrate (CH₃COONa·3H₂O) : colorless transparent crystal.

Solubility:

Soluble in water, solubility increases significantly with temperature (at 20°C, about 46.5 g per 100 mL of water).

Slightly soluble in ethanol, insoluble.

Melting point:

Anhydrous sodium acetate: 324°C.

Sodium acetate trihydrate: 58°C (dehydration decomposition).

Density:

Anhydrous sodium acetate: 1.528 g/cm³.

Sodium acetate trihydrate: 1.45g /cm³.

Hygroscopic: Sodium acetate trihydrate is easy to hygroscopic, and anhydrous sodium acetate hygroscopic is low.

Thermal stability
Heated decomposition. When heated to high temperatures, sodium acetate decomposes to

form sodium carbonate (Na₂CO₃) and methane (CH₄)

Brief introduction

Sodium acetate (chemical formula CH3COONa, also written as NaC2H3O2, NaOAc), also known as Sodium acetate, crystal water free (CH3COONa) and trihydrate (CH3COONa·3H2O) two forms.

Anhydrous sodium acetate is white or off-white powder, specific gravity 1.528, melting point 324°C, boiling point 881.4°C, soluble in water, insoluble in organic solvents, aqueous solution is alkaline.

The crystallized sodium acetate trihydrate has a specific gravity of 1.45 and a melting point of 58°C. At 120°C, the crystal water becomes anhydrous sodium acetate. And weathered in the atmosphere, gradually lost water, over time into a white powder.
Like other soluble acetate salts, sodium acetate can be synthesized by reacting acetic acid with sodium hydroxide, sodium carbonate, or sodium bicarbonate:

HOAc + NaOH - NaOAc + H ₂ O

2 hoac + Na ₂ CO naoac ₃ - > 2 + CO ₂ + H ₂ O

HOAc + NaHCO ₃ - NaOAc + CO ₂ + H ₂ O

Packaging

Riel Chemical sodium acetate production site

Sodium acetate application

(1) Environmental protection industry
Sewage treatment:
As a carbon source to promote microbial growth, improve biological nitrogen removal efficiency, often used in municipal sewage and industrial wastewater treatment.
Used in anaerobic and denitrification processes to reduce nitrate and nitrite concentrations in wastewater.
Flue gas desulfurization: It is used in some industrial waste gas treatment processes to neutralize acidic gases and reduce pollutant emissions.
(2) Textile and dye industries
Printing and dyeing auxiliaries: used in textile dyeing and printing process to adjust the pH value of dye bath, prevent dye hydrolysis, improve dyeing uniformity and color fastness.
Neutralizer: Used to neutralize residual acid after acid dyeing and improve fabric quality.
(3) Leather tanning
pH regulator: In the leather tanning process, sodium acetate trihydrate can be used as a buffer to adjust the pH and improve the softness and durability of the leather.
Auxiliary agent: can be used in chrome tanning or vegetable tanning process to improve the penetration effect of tanning preparations and optimize the quality of leather.
(4) Chemical industry
Organic synthesis: Used for the synthesis of acetic acid, acetyl compounds and certain pharmaceutical and fragrance intermediates.
Buffers: Buffers used to regulate pH in chemical reactions, especially for acetic acid systems.
Catalysts or reaction auxiliaries: used as catalysts or complexing agents in some chemical synthesis processes to improve reaction rate and yield.
(5) Construction industry
Concrete antifreeze:
Adding sodium acetate trihydrate can reduce the freezing point of concrete and prevent cement from losing strength due to freezing during construction in low temperature environment in winter.
It can also reduce concrete shrinkage and improve durability.
(6) Thermal energy storage materials
Phase change energy storage:
Since sodium acetate trihydrate can release a lot of heat during crystallization (latent heat of phase transition is about 264 kJ/kg), it can be used to make warm handbags, self-heating food, medical hot pads, etc.
It can also be used in heat storage systems in industrial heating or building energy conservation to improve energy efficiency.
(7) Electroplating industry
Plating buffer: In some plating processes, sodium acetate trihydrate can be used to adjust the pH value of the electrolyte, stabilize the plating solution, and improve the quality of the coating.

What is a Carbon Source?

Carbon source refers to the source of carbon elements required for microbial growth and metabolism, mainly used in sewage treatment, biological fermentation, microbial culture and other fields.

In the process of sewage treatment, especially biological nitrogen removal (denitrification), microorganisms need organic carbon sources to reduce nitrate (NO₃) to nitrogen (N₂), so as to remove nitrogen pollution in wastewater. If the organic matter (such as BOD/COD) in the sewage is insufficient, additional carbon sources are needed to promote denitrification.

Classification of carbon sources
Carbon sources can be divided into organic carbon sources and inorganic carbon sources, of which organic carbon sources are the most common in sewage treatment applications.

1. Organic carbon source (often used in sewage treatment)
Small molecular carbon source (easily utilized by microorganisms) :
Sodium Acetate: common, COD value 780 mg O₂/g, suitable for denitrification.
Methanol: COD is low, but cheap, suitable for low-temperature sewage treatment.
Ethanol: higher COD, denitrification rate is fast, but the cost is higher.
Glucose: suitable for specific biochemical processes, the price is higher.
Macromolecular carbon sources (slower degradation) :
Starch, Molasses: Food industry by-products, low cost, suitable for specific microbial communities.
2. Inorganic carbon source (mainly used for photosynthetic microorganisms)
Carbon dioxide (CO₂) : Used in algae or photosynthetic bacteria culture.
Carbonates (such as sodium bicarbonate NaHCO₃) : Suitable for anaerobic microorganisms such as methanogens.
Why use a carbon source?
In sewage treatment, the main roles of carbon sources include:

Provide microbial energy: help microbial metabolism and reproduction, improve the efficiency of sewage treatment.
Promotes denitrification: helps to remove nitrates (NO ⁻) and nitrites (NO₂⁻) from the water to prevent eutrophication.
Improve the BOD/COD ratio: improve the biodegradability of sewage, making it easier for microorganisms to degrade pollutants.
How to choose the right carbon source?
When choosing a carbon source, consider:

Treatment objective: Is it to remove nitrogen (denitrification) or to provide energy?
Economic cost: the price and use cost of sodium acetate, methanol, molasses, etc.
Treatment process: Different wastewater treatment processes (such as MBR, SBR, anaerobic process, etc.) have different requirements for carbon sources.
Microbial adaptation: Certain carbon sources are more effective for specific microbial communities.
Is sodium acetate a good carbon source?
Yes, sodium acetate (CH₃COONa) is one of the most commonly used additional carbon sources for sewage treatment because:

Easy to be used by microorganisms, improve the denitrification rate.
High COD value (780 mg O₂/g), moderate cost performance.
Non-toxic, harmless and safer than methanol.
Suitable for low-temperature sewage treatment, more stable than methanol and ethanol.
However, the cost of sodium acetate is slightly higher than that of methanol, so in large-scale wastewater treatment plants, different carbon sources may be selected according to economy.

What is COD ?

The COD (Chemical Oxygen Demand) of Sodium Acetate refers to the amount of oxygen consumed when it is decomposed by oxidation in water. COD is an important indicator to measure the degree of organic pollution, usually expressed in mg O₂/L (mg oxygen per liter).

Sodium acetate is a common carbon source in water treatment and is widely used in biological nitrogen removal processes (such as denitrification) because it provides microorganisms with readily available organic matter. However, it is also an organic matter itself and consumes oxygen, so its COD value needs to be considered when calculating the sewage treatment load.

1. The situation in sewage treatment
Carbon source for denitrification: In the biological denitrification process, microorganisms need a carbon source (such as sodium acetate) to complete the denitrification and reduce the nitrate (NO₃) to nitrogen (N₂) to reduce water pollution. At this point, the higher COD value of sodium acetate is advantageous because it provides enough organic carbon for microbial utilization.
Sewage discharge control: If the COD in the wastewater is too high, it may lead to eutrophication of the water body and affect the ecological environment. Therefore, in the final discharge stage of wastewater treatment, the COD value needs to be controlled to ensure compliance with discharge standards.
2. In the chemical and food industries
Chemical synthesis: Sodium acetate is used as a buffer or reaction raw material in some chemical reactions, and the COD size usually does not affect its chemical action.
Food industry: Sodium acetate can be used as a food additive (such as preservatives, flavorings), but the food industry generally does not focus on COD, but on purity and safety.

How do you judge which COD is best?

If used for sewage treatment as a carbon source: COD can not be too low, otherwise it is difficult for microorganisms to use, affecting the denitrification efficiency.
If it is wastewater discharge or environmental monitoring: the lower the COD, the better to reduce pollution.

Denitrifying Bacteria
Applicable carbon source: Sodium Acetate, Methanol, Ethanol, Glucose
Main role: for denitrification and nitrogen removal (will NO₃⁻ → N₂), often used in sewage treatment
Common bacteria:
Pseudomonas: such as Pseudomonas stutzeri, is highly adaptable to sodium acetate
Bacillus: such as Bacillus subtilis
Paracoccus: such as Paracoccus denitrificans
Denitrificans
Features:
Nitrate or nitrite can be reduced to nitrogen by using organic carbon sources as electron donors
Preference for short chain small molecule carbon sources, such as sodium acetate, methanol, ethanol

FAQ

1.What is your payment term?

We can accept T/T and L/C at sight as payment term.

2.Are you able to deliver on time?

Of course! we specialised in this line for many years,

many customer make a deal with me because we can deliver the goods on time and keep the goods top quality!

3.Do you provide free sample?

Yes, we can provide free sample . You only need to take the express fee.

4.How about the price?Can you make it cheaper?

We always take the customer’s benefit as the top priority.

Price is negotiable under different conditions, we are assuring you to get the most competitive price.

5.Can I visit your company and factory in China?

Sure. You are very welcomed to visit our company in Weifang, China.

(We will have someone responsible for picking up and dropping off at Weifang Airport)

6.What if there is a quality problem?

We have a professional and perfect after-sales service team, timely for you to deal with all problems.