Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
Basic Information
Product Name: Poly(iminocarbonimidoyliminocarbonimidoylimino-1,6-hexanediyl) hydrochloride
CAS Number: 32289-58-0
Alias: Polyhexamethylene biguanide hydrochloride, PHMB, Polyhexanide HCl, Polyaminopropyl Biguanide
Molecular Formula: (C8H17N5)n·xHCl
Repeating Unit Molecular Weight: 219.72
IUPAC Name: Poly(iminocarbonimidoyliminocarbonimidoyliminohexamethylene) hydrochloride
Structural Information
- Structure Type: Cationic polymeric biguanide hydrochloride disinfectant
- Structural Features: Linear polymer chain composed of repeating biguanide groups linked by 1,6-hexamethylene alkyl chains; multiple positively charged guanidinium groups in aqueous solution, can adsorb negatively charged bacterial cell membranes to rupture and kill microbes
Physical & Chemical Properties
- Appearance: Solid: white crystalline powder; Commercial product: colorless to pale yellow transparent aqueous solution
- Odor: Slight mild amine odor
- pH (1% aqueous solution, 25℃): 6.0–8.0
- Solubility: Freely soluble in water, methanol; insoluble in non-polar solvents (toluene, mineral oil, ether)
- Stability: Stable under room temperature sealed storage; good acid-base compatibility, long-lasting antibacterial effect; incompatible with anionic surfactants (will precipitate and lose activity); heat-resistant, no decomposition under conventional disinfection temperature
Synthesis & Applications
Production Method
Molten polycondensation of dicyandiamide and 1,6-hexanediamine at 170–230℃, then acidified with hydrochloric acid, decolorized and refined to obtain polymer hydrochloride product
Main Applications
- Medical disinfection: Wound antiseptic, contact lens care solution, surgical instrument surface disinfectant
- Cosmetic preservative: Allowed additive in skincare, shampoo, shower gel (max 0.3% concentration in EU cosmetics)
- Industrial bactericide: Water treatment algae/bacteria inhibitor, textile antibacterial finishing agent, paper & leather mildew inhibitor
- Daily hygiene: Sanitary wipes, laundry antibacterial additive, floor disinfectant
Safety & Storage Instructions
GHS Hazard Classification
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
- May trigger allergic skin reaction with long-term skin contact
Personal Protection
Dust mask, chemical splash goggles, nitrile gloves; operate in ventilated space, avoid mixing with anionic surfactants
Storage Condition
Hermetically sealed container, cool dry warehouse; isolate anionic detergents, oxidants, strong alkaline substances
Transportation
General industrial biocide chemical; avoid direct sunlight, high temperature and package leakage
Quality Specifications
- Active polymer content: 20%/25%/50% liquid; ≥95% powder
- Loss on Drying (powder): ≤3.0%
- Heavy Metal (Pb): ≤10 ppm
- Microbial limit: No bacteria, mold, yeast detected
Information Summary Table
| Item | Specification |
| CAS Number | 32289-58-0 |
| Product Name | Poly(iminocarbonimidoyliminocarbonimidoylimino-1,6-hexanediyl) hydrochloride |
| Synonym | PHMB, Polyhexamethylene biguanide hydrochloride |
| Molecular Formula | (C8H17N5)n·xHCl |
| Repeating Unit MW | 219.72 |
| Appearance | White powder / pale yellow aqueous solution |
| Solubility | Fully soluble in water, insoluble in oil solvents |
| Purity Standard | Liquid:20%-50%; Powder ≥95% |
| Storage Condition | Sealed cool dry storage, separate from anionic surfactants |
| Hazard Property | Irritant to skin, eyes and respiratory tract |
| Main Usage | Medical antiseptic, cosmetic preservative, industrial water & textile antibacterial agent |
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