Biocide Chemicals
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and advanced technology.Biocides category as below:
aldehydes, halogens, hydantoins, isothiazolinones and
other environment-friendly biocides.
Glyoxal 40% Aqueous Solution
CAS No.:
107-22-2
Molecular Formula:
C2H2O2
Molecular Weight:
58.04
Structure Formular:
Properties:
Glyoxal 40%(107-22-2) is the crystalline or liquid crystalline or liquid that is colorless or yellow. The formula of glyoxal is C2H2O2. This kind of aldehyde is soluble in ethanol, and ether, and soluble in water. Chemically active, it also can be added or condensed with ammonia, amide, aldehyde, and carboxyl compounds.
Specifications:
Glyoxal 40 wt% aqueous solution is a high-purity fine chemical product belonging to the aldehyde class of biocides. As a core biocide and chemical intermediate, Glyoxal 40 wt% solution is produced in three graded specifications to meet the diverse quality requirements of different industrial applications, all adhering to strict production and quality control standards.
| Item | Index | ||
|---|---|---|---|
| Top-grade | First-grade | Industry-grade | |
| Chroma Pt-Co unit Color No. | ≤ 10# | ≤ 15# | ≤ 15# |
| Glyoxal | ≥ 40%±0.5% | ≥ 40%±0.5% | ≥ 40%±0.5% |
| Methanol | 6%~7% | 6%~7% | |
| Acid (formic acid) | ≤ 0.1% | ≤ 0.15% | ≤ 0.2% |
| Aldehyde (formaldehyde) | ≤ 0.1% | ≤ 0.2% | ≤ 0.3% |
| Glycol | ≤ 1.0% | ≤ 1.5% | ≤ 1.5% |
Preparation Methods:
The commercial production of Glyoxal 40 wt% aqueous solution relies on two mature industrial processes, both optimized for scalability and product quality.
1. Gas-phase Catalytic Oxidation of Ethylene Glycol. (Primary Process)
The catalytic oxidation of ethylene glycol and air in the presence of a copper catalyst at 250-300°C produces glyoxal. The active component of the catalyst is copper oxide (containing Cu03-8%). The carrier is alumina or is made of corundum, aluminum sand, impregnated with copper nitrate, and roasted. The catalyst has a service life of one year and is regenerated by cauterization.
The glycol is preheated and gasified and mixed with circulating gas into the catalytic reactor. The amount of fresh air is controlled to prevent deep oxidation of the glycol. And a nitrogen gas stream is used to bring in halogen compounds as inhibitors of deep oxidation. The reaction is carried out at 275°C and 0.74 MPa pressure. The reaction product is chilled with water. Absorption and refinement are the finished product. The one-way conversion of ethylene glycol is 80-85%.
2. Acetaldehyde nitric acid oxidation method.
Using copper nitrate as a catalyst. The liquid phase oxidation is carried out with nitric acid. Under the condition of stirring and sufficient cooling, acetaldehyde and nitric acid are each prepared into about 50% solution, copper nitrate into 40% solution, and sodium nitrite into 5% solution.
Add a small amount of nitric acid solution and acetaldehyde solution to the reaction pot first. Then put in the sodium nitrite solution. Heat slightly until brownish-red gas occurs. Naturally, raise the temperature to 30°C. Begin to add a small amount of nitric acid solution and acetaldehyde solution dropwise at the same time. About 4h add up. The reaction temperature is controlled at 40-45℃. The escaped acetaldehyde gas is absorbed by water and added to the reaction pot and the reaction continues for 3h.
The ingredients of acetaldehyde in the reaction are overdosed (by molar ratio, nitric acid: acetic acid = 1:2). After the reaction, acetaldehyde was recovered by heating to 98°C. Then activated carbon was added to decolorize, cooled, filtered, and washed with water. The filtrate and the washings were combined. Evaporate the organic acid below 70℃ (21.33kPa). Repeatedly replenish water, and steam again until the acidic cation exchange resin and weakly basic anion exchange resin in the distillate, removing impurities. The exchange solution and eluate are concentrated to obtain a qualified concentration of glyoxal. In terms of glyoxal, the yield is about 32%.
Applications:
Glyoxal 40 wt% aqueous solution is a multi-functional chemical with extensive use in chemical synthesis, medicine, papermaking, flavor & fragrance, coatings, adhesives, daily chemicals, textile, leather, oilfield and biocide industries. Its core applications include:
Chemical Synthesis & Fine Chemicals
Serves as a key intermediate for the direct synthesis of imidazole, 2-methylimidazole, glyoxalic acid, textile finishing agents, iron-free resins and papermaking auxiliaries; condenses with amines to form 2-hydroxypyrazine (a critical raw material for sulfonamides and insecticides).
Textile Industry
Acts as a high-performance fiber treatment agent for cotton and nylon, significantly improving fiber spinning performance and anti-wrinkle properties; in Japan, 80% of glyoxal consumption is dedicated to textile finishing applications.
Coating & Adhesive Industry
Functions as a cross-linking agent for polymers; cross-links with acryloylenal copolymers to produce glass fiber sheets, and improves the water resistance of copolymer-based coatings and adhesives by forming stable cross-linked structures.
Oilfield Biocide & Industrial Additive
Used as a biocide for water-based oil well-fracturing fluid (effective microbial control); serves as a cross-linking agent for cellulose, enhancing the structural stability of cellulose-based industrial materials.
Other Industries
Acts as an insoluble adhesive in the leather industry; a key raw material for waterproof match production; a functional additive in papermaking for improving paper strength and processing performance.
Biocide Applications
As a member of IRO Biocide’s aldehyde biocide series, it exhibits effective antimicrobial properties for water treatment and industrial system microbial control (compatible with water-based systems due to aqueous formulation).
Packing and Storage:
Standard packaging in 200L plastic pails (sealed to prevent air contact and contamination), suitable for industrial transportation and storage.
Storage Requirements:
- Store in a cool, dry, well-ventilated warehouse; avoid direct sunlight, fire and heat sources.
- Maintain sealed packaging to prevent contact with air (oxidation and deterioration risk).
- Do not store for long periods; use within the recommended shelf life.
- Store separately from alkalis, acids, wet items and incompatible chemicals to avoid chemical reactions.
- Ensure good ventilation in the storage area to prevent vapor accumulation.
Hazard Overview:
Use appropriate personal protective equipment (PPE) to avoid direct contact with skin, eyes and mucous membranes; ensure adequate ventilation during handling to prevent inhalation of vapor.
- The LD50 for rats is 2020 mg/kg and for mice is 600 to l000 mg/kg (based on 100% glyoxal). Glyoxal can strongly irritate the mucous membrane of the skin. It may be harmful to humans when inhaled, ingested, or absorbed through the skin. The vapor of glyoxal is irritating to the eyes, skin, mucous membranes, and upper respiratory tract.
- Environmental hazards: It is harmful to the environment, and pollution to the atmosphere.
- Explosion hazard: Glyoxal is poisonous and irritating.
Synonyms:
Glyoxal 40 wt solution in water; CAS 107-22-2; ethanedial 40% aqueous solution; oxalaldehyde biocide; glyoxal for textile industry; glyoxal cross-linking agent; IRO Biocide glyoxal; Glyoxal, Ethanedial; 1,2-ethanedione; Ethane-1,2-dione; Oxalaldehyde; Glyoxalaldehyde; BISFORMYL; Biformyl; Biformal; Diformal; GLYOXALE; GLIOSSALE.
About the Supplier
Shandong IRO Biocide Chemicals Co.,Ltd. is a renowned manufacturer of biocide chemicals, offering a full range of biocide products including aldehydes, halogens, hydantoins, isothiazolinones and environment-friendly biocides. With advanced production technology, strict quality control, experienced technical experts and professional one-stop service, IRO Biocide provides customized chemical solutions for global industrial customers. For more information about Glyoxal 40 wt% solution and other biocide products, visit the official website: https://www.irobiocide.com/products/glyoxal/