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Anhydrous Sodium Bisulfate cas no 7681-38-1

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CAS No.:

7681-38-1

Grade:

Industrial Grade

Content:

99%

Port:

qingdao

Brand:

hly

Packaging:

25kg woven bag with PE inner liner

Price valid (until):

2027-02-28

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Suqian City Hengliyuan Import and Export Trade Co., LTD

Company Type:

Trader

Location:

China

Payment Terms:

TT against B/L draft before shipment,100% TT in advance

Average Lead Time:

30 days

Qualification:

Main Products:

Acrylonitrile,Sodium biselenite methylamine solution,Methylamine [anhydrous],Zinc dust,Hydrogen peroxide solution [content >8%],Triisopropyl borate

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Product Description
Seller Information
Inquiry History

Description

Company Profile ----------
Suqian City Hengliyuan Import and Export Trade Co., LTD is a trading company. The company has introduced advanced scientific and technological achievements from home and abroad, and has superior products from well-known manufacturers at home and abroad. The basic functions are:
1. Domestic trade of various chemical raw materials;
2. Providing price information services and chemical raw material procurement for industrial enterprises;
3. Cooperating with Chinese state-owned enterprise factories, the price and quality are very advantageous.
At present, the company is relying on the combination of industry and trade and global procurement to steadily improve the company's value-added ability and compound competitiveness. We have always been committed to producing high-quality and low-cost goods, so we have been sincerely recognized by many customers. Our goal is to produce the best products and satisfy every customer with professional services and attitudes. We look forward to cooperating with you and establishing a win-win relationship with you. Please rest assured that we will definitely satisfy you.

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----------Our Advantages---------
High quality with competitive price
1) Standard:BP/USP/EP/Enterprise standard
2) All Purity≥99%
3) We can provide high quality products with factory price
2. Fast delivery
1) Fast shipment.Various transportation methods for your choice.
2) We have our own agent/remailer/distributor who can help us ship our products very fast , and we have stock in the ir for transferring.
3. Good communication and credit
1) Fast response to customer within 5 hours
2) Good business credit in Europe, US, Japan, Korea, Af r ica and so on.

Complete Product Details – Sodium Bisulfate Monohydrate (CAS 7681-38-1)

1. Basic Identification Information

CAS No.: 7681-38-1

Chemical Name: Sodium Bisulfate Monohydrate

Synonyms: Sodium Hydrogen Sulfate Monohydrate, Acid Sodium Sulfate, Sodium Bisulphate

EINECS No.: 231-665-7

MDL No.: MFCD00003531

Molecular Formula: NaHSO₄·H₂O

Molecular Weight: 138.07

SMILES: [Na+].OS(=O)(=O)[O-].O

UN Transport Number: UN 3260

HS Code: 28331900

Hazard Classification: Class 8 Corrosive Solid (Acidic Inorganic), Packing Group III

Chemical Category: Inorganic acidic bisulfate, solid low-cost acidulant & pH regulator

2. Physical & Chemical Properties

Appearance

White crystalline powder, granular or spherical pearl particles; slight hygroscopicity; no visible impurities under dry sealed storage.

Core Physical Constants

Parameter	Standard Value
Melting Point	315 ℃ (decomposes above melting point, releases sulfur trioxide)
Solid Density	2.1 g/cm³
pH (1% aqueous solution)	1.0–1.5, strong acidity
Solubility in Water	39 g/100 mL at 20 ℃; fully soluble in hot water
Solubility in Organics	Insoluble in ethanol, methanol, acetone; decomposes in alcohol to Na₂SO₄ + H₂SO₄
Hygroscopicity	Absorbs moisture in humid air; easy to agglomerate without tight sealing
Thermal Stability	Stable at room temperature; decomposes at high temperature into sodium pyrosulfate, sulfur trioxide and water vapor

Key Chemical Characteristics

Strong solid inorganic acid, widely used as safe solid substitute for liquid sulfuric acid; avoids high volatility and liquid leakage risks.
Reacts with carbonates, bicarbonates to release carbon dioxide gas, applicable to leavening systems.
Mild oxidizing property under heating; compatible with most neutral raw materials, but reacts violently with strong alkalis, metal oxides, metals, bleaching agents.
No toxic heavy metal residues in food-grade grade, approved by FCC food additive standard as acidulant and preservative.
Corrosive to skin, eyes and respiratory tract dust; long-term dust inhalation irritates mucous membranes severely.

3. Export Industrial & Food Grade Quality Specifications

Premium Industrial Grade (Mainstream Export)

Test Item	Standard Spec	Test Method
NaHSO₄·H₂O Purity	≥98.0 %	Acid-base titration
Sodium Sulfate Impurity	≤2.0 %	Gravimetry
Moisture Content	≤0.5 %	Karl Fischer Titration
Chloride Ion (Cl⁻)	≤0.10 %	Silver Nitrate Titration
Ferric Ion (Fe)	≤0.005 %	Spectrophotometry
Heavy Metal Lead (Pb)	≤10 ppm	Atomic Absorption
Appearance	Uniform white crystal/granule without caking	Visual Inspection

Food Grade (FCC Standard)

Assay ≥99.0%, Pb ≤1 ppm, As ≤0.3 ppm, Se ≤2.5 ppm, Hg ≤0.1 ppm
Ultra-low insoluble matter, strictly controlled heavy metals for food, beverage and cosmetic applications

Water Treatment Special Grade

Low iron & low chloride formula, prevents pipeline corrosion and secondary pollution in circulating water systems.

4. Main Industrial Applications

4.1 Water Treatment Industry (Largest Consumption)

pH adjuster for swimming pools, spa water, municipal circulating cooling water; reduces alkalinity, inhibits limescale deposition and algae reproduction.
Wastewater neutralization agent for alkaline industrial wastewater, low cost and easy solid dosing compared with sulfuric acid.
Disinfection auxiliary: stabilizes chlorine-based disinfectants, improves sterilization efficiency.

4.2 Food & Beverage Industry (Food Grade Only)

Food acidulant, acidity regulator for baking powder, bakery products, canned fruits and vegetables.
Preservative & color stabilizer for meat, seafood and fruit processing; inhibits browning and microbial growth.
Acidifier for beverage, jam, jelly, pickled food, complies with international food additive regulations.

4.3 Textile & Dyeing Industry

Wool carbonizing agent: removes plant impurities from wool fabrics without fiber damage.
Acidic dye levelling agent, substitute of sulfuric acid for dye bath pH control, avoids volatile acid fumes.
Leather tanning bleaching auxiliary, uniform skin coloring.

4.4 Fine Chemical & Laboratory Field

Mineral decomposition flux for geological sample analysis, dissolves silicate and oxide ores.
Laboratory solid acidic analytical reagent, buffer preparation raw material.
Raw material for manufacturing sodium sulfate, alum and other sulfate salts.

4.5 Daily Chemical & Cleaning Industry

Solid acid raw material for toilet cleaner, metal descaling agent, industrial scale remover.
Cosmetic pH buffer, acidic raw material for facial cleanser, exfoliating skincare products (food-grade).

4.6 Other Scenarios

Oil well drilling mud pH modifier, soil acidification improver for alkaline farmland;
Metal surface pickling auxiliary for rust removal and passivation pretreatment.

5. Safety, Packaging, Storage & Transportation Regulations

GHS Hazard Classification

Serious Eye Damage Category 1
Skin Irritation Category 2

Signal Word: Danger

Main Hazard Statements:

H318 Causes serious eye damage

H315 Causes skin irritation

Export Standard Packaging

Industrial bulk granule: 25kg inner plastic liner + outer PP woven bag; 50kg lined iron drum
Food-grade spherical pearl: 25kg food-grade composite bag, moisture-proof aluminum film inner layer
Small trial packing: 1kg / 5kg sealed plastic can

Storage Requirements

Store in cool, dry, well-ventilated general corrosive chemical warehouse, temperature ≤30 ℃, fully sealed to prevent moisture absorption caking.
Separate storage away from strong alkalis, carbonates, oxidants, food raw materials and metal products.
Warehouse equipped with dust-proof ventilation, acid-resistant gloves, safety goggles and emergency eyewash station.
Shelf life: 12 months under dry sealed storage; crush and re-screen agglomerated material before use.

Sea & Land Transportation Rules

UN 3260, Class 8 corrosive inorganic acidic solid, Packing Group III

Keep packages waterproof during transit to avoid moisture absorption and bag breakage.
Forbid mixed loading with alkaline chemicals, edible additives and metal powder in one container.
Complete export clearance documents supplied: COA, MSDS, TDS, marine dangerous goods declaration.

6. E-commerce Listing Copy (Direct Copy for Echemi / Alibaba)

Product Title

Sodium Bisulfate Monohydrate CAS 7681-38-1 98% White Crystal Solid Acid pH Regulator for Swimming Pool Water Treatment Food Acidulant Textile Wool Carbonizing Agent

Short Description

Sodium Bisulfate Monohydrate (NaHSO₄·H₂O, CAS 7681-38-1) ≥98% white hygroscopic acidic crystal, safe solid substitute of sulfuric acid. Widely used as pH adjuster for swimming pool & industrial wastewater, food-grade acidulant for bakery, wool carbonizing agent for textile and descaling raw material for cleaning products. Full export documents COA, MSDS and TDS available.

Full Listing Description

Sodium Bisulfate Monohydrate (also named Sodium Hydrogen Sulfate) with CAS registry number 7681-38-1 is a low-cost solid inorganic acid supplied as white crystal, granule or spherical pearl complying with industrial and FCC food-grade standards. It features stable acidity, low volatility and convenient solid transportation & dosing, replacing liquid sulfuric acid to reduce leakage risk.

Core downstream sectors cover water treatment for pool pH control and wastewater neutralization; food processing acidulant & preservative; textile wool carbonization and dye bath pH regulator; daily chemical descaling cleaner raw material; geological mineral decomposition flux and laboratory analytical reagent. We provide two customizable grades: industrial technical grade and FCC food grade with ultra-low heavy metal impurities.

Flexible packaging includes 25kg woven bags and lined iron drums for full container orders. Classified as UN3260 Class 8 corrosive solid dangerous goods, we supply complete official customs clearance papers to support global sea and land delivery with stable continuous mass supply capacity.

7. Printable Export Certificate of Analysis Template

CERTIFICATE OF ANALYSIS

Product Name: Sodium Bisulfate Monohydrate

CAS No.: 7681-38-1

Grade: Export Premium Industrial Grade

Net Weight: 25kg/bag

Test Item	Standard Spec	Test Result	Test Method
NaHSO₄·H₂O Assay Purity	≥98.0 %		Acid-Base Titration
Sodium Sulfate Impurity	≤2.0 %		Gravimetry
Moisture Content	≤0.5 %		Karl Fischer Titration
Chloride Ion	≤0.10 %		Silver Nitrate Titration
Ferric Ion (Fe)	≤0.005 %		Spectrophotometry
Lead Heavy Metal (Pb)	≤10 ppm		Atomic Absorption
Appearance	Uniform white crystal without agglomeration	Visual Inspection

Conclusion: This batch meets premium export industrial standard of Sodium Bisulfate Monohydrate.

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ECHEMI Editorial Reference

Also known as sodium acid sulfate, niter cake, sodium hydrogen sulfate, NaHS04, is colorless crystals or white fused lumps,whose aqueous solution is strongly acid.It is soluble in water and noncombustible. Derived as a byproduct in the manufacture of hydrochloric acid and nitric acid, it is purified by recrystallization. Used as a flux for decomposing minerals,substitute for sulfuric acid in dyeing,disinfectant, in the manufacture of sodium hydrosulfide,sodium sulfate,and soda slum,for liberati
Bisulfate, aqueous solution is a white crystalline solid dissolved in water. It is corrosive to metals and tissue.|DryPowder; DryPowder, OtherSolid, Liquid; Liquid; OtherSolid; PelletsLargeCrystals; WetSolid|White, odourless crystals or granules
Bisulfate, aqueous solution is a white crystalline solid dissolved in water. It is corrosive to metals and tissue.

Certificates

Basic Info

Product Name:

Sodium bisulfate

Other Name:

Sulfuric acid,sodium salt (1:1);Sulfuric acid,monosodium salt;Nitre cake;Sodium acid sulfate;Sodium bisulfate;Sodium hydrogen sulfate;Niter cake;Monosodium sulfate;Bisulfate of soda;Sodium hydrosulfate;Monosodium hydrogen sulfate;BIF;Fanal;WC 00;WC-Klosettreiniger;WC-Perfect;WC-Super;Sodium hydrogen sulfate (NaHSO4);Sodium bisulphate;Acid sodium sulfate;Monobasic sodium sulfate;Printgen N;Poultry Litter Treatment;SBS Pet;pHase (sodium bisulfite);12262-56-5;1903778-63-1

CAS No.:

7681-38-1

Molecular Formula:

H2O4S.Na

InChIKeys:

InChIKey=PANBYUAFMMOFOV-UHFFFAOYSA-N

Molecular Weight:

120.06

Exact Mass:

119.949

EC Number:

231-665-7

UNII:

BU8V88OWIQ

UN Number:

2837

DSSTox ID:

DTXSID3033983

HScode:

28331900

Categories:

Inorganic Salts

Characteristics

PSA:

85.8

XLogP3:

0.08540

Appearance:

White to light yellow Granules

Density:

2.1

Melting Point:

315 °C

Boiling Point:

330ºC at 760 mmHg

Water Solubility:

soluble in 2 parts H2O, 1 part boiling H2O; decomposes in alcohol to sodium sulfate and H2SO4 [MER06]

Storage Conditions:

Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from water. Corrosives area.

Flammability characteristics:

Non-combustible; the fire breaks down and emits toxic sulfur oxides and sodium oxide fumes

PH:

Solutions are strongly acidic

Air and Water Reactions:

Dissolves in water to give strongly acidic solutions.

Reactive Group:

Salts, Acidic

Reactivity Profile:

Acidic salts, such as various BISULFATES, are generally soluble in water. The resulting solutions contain moderate concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions. The combination of calcium hypochlorite, sodium hydrogen sulfate, starch, and sodium carbonate, when compressed, caused the materials to incandescence, followed by explosion, [Ind. Eng. Chem., 1937, 15, 282].

See More Sodium bisulfate Properties 

Hazard Identification

Classification of the substance or mixture

Serious eye damage, Category 1

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H318 Causes serious eye damage
Prevention	P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
Response	P305+P354+P338 IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P317 Get medical help.
Storage	none
Disposal	none

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

See More Sodium bisulfate Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
Acrylonitrile,Sodium biselenite methylamine solution,Methylamine [anhydrous],Zinc dust,Hydrogen peroxide solution [content >8%],Triisopropyl borate

Location:
Shop No.15, 1st Floor, Building 12, Hengda Huafu, Sucheng District, Suqian City

Payment Terms:
TT against B/L draft before shipment,100% TT in advance

Average lead Time:
30 days

Total Annual Revenue:
Less than $1 million

Total Employees:
5-10

Year of Establishment:
2022
Company Overview

Suqian Hengliyuan Import and Export Corporation, Ltd. is a leading enterprise specializing in the international trade of chemical products. Established in Suqian, Jiangsu Province, China, our company has built a strong reputation for excellence and reliability in the chemical industry.

Our Mission

Our mission is to facilitate global trade by providing high-quality chemical products and exceptional service to our clients. We aim to be a bridge between manufacturers and end-users, ensuring the safe and efficient transfer of chemicals across borders.

Products and Services

We offer a comprehensive range of chemical products, including but not limited to:

Industrial Chemicals: Raw materials for various industries such as pharmaceuticals, agriculture, and manufacturing.

Specialty Chemicals: High-performance chemicals used in specific applications, including water treatment, coatings, and adhesives.

Bulk Chemicals: Large-volume chemicals for industrial processes and manufacturing needs.

Quality Assurance

At Suqian Hengliyuan Import and Export Corporation, Ltd., quality is our top priority. We adhere to stringent quality control measures and international standards to ensure that our products meet the highest levels of purity and performance. Our dedicated quality assurance team conducts rigorous inspections and testing to guarantee the integrity and safety of all our chemical products.

Global Network

Leveraging our extensive network of suppliers and partners, we are able to source and deliver a wide array of chemical products to clients worldwide. Our strategic partnerships and logistical expertise enable us to offer competitive pricing, timely delivery, and customized solutions to meet the diverse needs of our clients.

Commitment to Sustainability

We are committed to sustainable business practices and environmental stewardship. Our operations are designed to minimize environmental impact, and we continuously seek ways to improve our processes and reduce our carbon footprint. We work closely with our suppliers and customers to promote the responsible use and disposal of chemicals.

Customer Focus

Our clients are at the heart of everything we do. We pride ourselves on providing personalized service and building long-term relationships based on trust and mutual benefit. Our experienced team of professionals is dedicated to understanding our clients' needs and delivering solutions that exceed their expectations.

Inquiry History

8 Inquiries

Country	Product	Purchase Quantity	Date Posted
Germany	Sodium metabisulfite	3000 MT	Jun 15, 2024
Brazil	Sodium Bisulfate	22 MT	Aug 26, 2025
United Arab Emirates	Sodium Bisulphate	100.00 KG	May 23, 2025
Kuwait	Sodium Bisufate	20 20' Fcl	Oct 17, 2025
United Arab Emirates	Sodium Bisulphate	200.00 KG	Feb 27, 2025
United States	Sodium Bisulfate	1 TON	Aug 15, 2024
India	Sodium Bi Sulphate	20.00 MT	May 30, 2024
Bulgaria	Sodium Bisulfate	100 MT	Jan 13, 2026

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