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Views: 0 Author: Site Editor Publish Time: 2026-09-18 Origin: Site
With the rapid growth of industries including personal care, cosmetic formulation, water- based coatings, textile finishing, household disinfection, water treatment and industrial waterborne systems, problems such as microbial contamination, bacterial reproduction, mold spoilage, product off- odor and shortened shelf- life have become prominent. Conventional biocides frequently suffer from insufficient bactericidal potency, narrow antimicrobial spectrum, high irritation, poor compatibility with surfactants, instability under high temperature, heavy metal residues or strong odor. Many cosmetic, home- care and industrial projects demand low- irritation, non- releasing, high- efficiency liquid bactericides.
Against this industry background, PHMB 20%— a 20% active aqueous solution of Polyhexamethylene Biguanide — emerges as a benchmark cationic polymeric biocide. Featuring broad- spectrum bactericidal performance, low skin irritation, excellent water solubility, high thermal stability and outstanding cost- effectiveness, it delivers reliable one- stop antimicrobial solutions for cosmetics, disinfection, textiles, water treatment and multiple industrial segments.
PHMB 20% is an aqueous solution of Polyhexamethylene Biguanide hydrochloride (CAS: 32289- 58- 0). Its polymeric molecular structure grants distinctive physicochemical properties suitable for diversified industrial applications. Key specifications are shown below:
Active PHMB content: 20±1 %, water as solvent. Free monomer and harmful residual impurities are strictly controlled; heavy- metal content meets cosmetic- grade and industrial biocide requirements. Compliant with global regulatory standards for personal- care articles, textile finishing agents and circulating water treatment.
Appearance: Clear to pale- yellow transparent liquid, almost odorless. Specific gravity (20 °C):
1.04- 1.08 g/ mL, raw liquid pH 4.0- 6.0. Fully miscible with water, lower alcohols and glycols; no pre- dissolution or heating required, convenient for direct addition into water- based production systems.
Maintains stable bactericidal activity under processing temperature up to 90 °C, applicable for high- temperature textile finishing, coating thermal grinding and other thermal workflows. Effective working pH range: 3.0- 9.5, keeps strong antimicrobial effect across acidic, neutral and weakly- alkaline environments. No precipitation under normal storage conditions; avoid long- term freezing.
It is a cationic polymer. Good compatibility with non-ionic and amphoteric surfactants; incompatible with large-dose anionic surfactants, anionic polymers and anionic dyes,which may
cause flocculation or activity loss .Without negative influence on product color and transparency when correctly formulated; can adsorb onto fiber and solid surfaces to obtain surface-lasting antibacterial performance.
PHMB 20% exerts bactericidal effects relying on its unique cationic polymeric biguanide structure.It does not rely on release of small-molecule irritant substances, and suppresses microbes via physical-chemical interaction with microbial cell membranes.
Positively-charged PHMB polymer chains are readily adsorbed onto negatively-charged bacterial, fungal and yeast cell surfaces. The polymer inserts into lipid layers of cell membranes,destroying membrane integrity, causing leakage of intracellular substances and resulting in rapid death of microbial cells.It inhibits reproduction of Escherichia coli , Staphylococcus aureus , Candida albicans , Aspergillus niger and various water-borne spoilage bacteria.
Thanks to its long-chain polymeric property,part of PHMB can adhere onto substrate surfaces such as textile fibers,forming a thin antibacterial layer and achieving residual surface bacteriostatic effect.It is non-corrosive to most equipment and base materials, low-odor, and will not produce irritating volatile decomposition products.It can be used alone or combined with other preservatives/biocides for synergistic efficacy,lowering overall biocide dosage and comprehensive formulation cost.
Benefiting from 20% standardized liquid form, powerful bactericidal activity and surface- adsorption feature, PHMB 20% is a well- recognized universal liquid biocide, covering personal- care, textile, water- treatment, household disinfection and water- based industrial materials. Recommended dosage varies for different fields:
Suitable for rinse- off and leave- on cosmetic products: body wash, shampoo, wet wipes, skin- care lotion, eye- care products and low- irritation cleansing formulations. It inhibits cosmetic microbial contamination, prevents peculiar smell and mildew, extends shelf- life; meets cosmetic safety regulations for permitted usage of PHMB.
Applied in antibacterial finishing of cotton, chemical- fiber fabrics, non- woven materials, masks and hygiene textiles. Adsorbs onto fiber surfaces to obtain durable antibacterial performance; restrains bacteria breeding on textile surfaces, reduces odor generation caused by sweat- decomposition, improves hygiene performance of finished textiles.
Used for cooling circulating water, swimming auxiliary water, industrial process water, to suppress bacteria, algae and slime- forming microorganisms; reduces pipeline bio- fouling, avoids bacterial slime accumulation and equipment blockage, stabilizes water- system operation.
Used for surface disinfectants, hard- surface cleaning agents, sanitizing liquid for household articles. Effective against common pathogenic bacteria, provides safe surface sanitization with low- irritation characteristics.
Applied in water- based coatings, polymer emulsions, leather processing auxiliaries. Controls bacterial spoilage in liquid systems, prevents barrel odour and slime formation; note: avoid heavy anionic components in formula to prevent flocculation risk.
Compared with conventional biocides such as isothiazolinones (MIT/CMIT), DMDMH, quaternary ammonium salts and solid PHMB powder, PHMB 20% has prominent strengths in antimicrobial performance, safety, thermal stability and practical application:
Unlike formaldehyde- releasing preservatives, PHMB- 20% does not release formaldehyde. Low skin- irritation risk; the 20% ready- to- use liquid avoids dust hazards existing in solid powder handling, and satisfies strict safety requirements for personal- care and hygiene- product manufacturing.
Effective against bacteria, yeast and partial moulds. Beyond in- liquid preservation, its cationic polymer structure enables adsorption onto fiber and solid surfaces to deliver surface- residual antibacterial effect, a unique advantage not available for many small- molecule preservatives.
Stable at high temperature up to 90 °C, suitable for high- temperature processing conditions where isothiazolinones will decompose and lose activity. Maintains good efficacy within pH 3.0- 9.5, adaptable to diversified complex water- based formula environments.
Standard 20% concentration liquid, direct feeding without dissolution. Compatible with automatic metering- feeding systems for large- scale production. Can be used independently or compounded with other biocides. One material serves multiple application fields, reducing raw- material inventory and comprehensive procurement cost.
> Note: Special attention: incompatibility with high- content anionic surfactants / anionic polymers. Formulation compatibility pre- test is strongly recommended before mass production.
DALIAN SINOBIO CHEMISTRY CO., LTD. is a specialized manufacturer engaged in R&D and production of biguanide- series bactericides and fine- chemical antimicrobial raw materials, a trusted supplier of high- quality PHMB 20 % aqueous solution. Relying on advanced polymerization synthesis technology, precise concentration- adjusting process and strict full- flow quality- control system, our PHMB 20 % product features stable active content, low harmful residual monomers, clear liquid appearance and consistent batch- to- batch quality, exceeding ordinary commercial- grade standards.
We provide targeted technical guidance and formulation suggestion for cosmetics, textile finishing, water- treatment and disinfection- product manufacturers. Supported by mature supply- chain and complete after- sales service system, we guarantee stable continuous supply, and help global customers solve core pain- points including microbial contamination and product quality deterioration. We deliver one- stop fine- chemical antimicrobial raw- material solutions with premium- grade products and professional- level services.
Looking for a reliable PHMB 20% manufacturer and supplier for cosmetics, textile finishing, water treatment, disinfection or water-based industrial applications? DALIAN SINOBIO CHEMISTRY CO., LTD. provides PHMB 20% aqueous solution with stable active content, controlled residual monomers, consistent batch quality and professional technical support. We can also provide formulation guidance and application suggestions according to your specific requirements.
Contact us today for PHMB 20% specifications, quotation, samples and technical support. Let us help you find a suitable antimicrobial raw material solution for your application.
DALIAN SINOBIO CHEMISTRY CO., LTD.
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E- mail: zhou@sinobiochemistry.com
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