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Views: 0 Author: Site Editor Publish Time: 2026-08-14 Origin: Site
With the booming development of cosmetics, personal care, textile auxiliaries, water-based coatings, household detergents and industrial waterborne formulations, manufacturers are facing severe challenges including bacterial contamination, mold growth, yeast breeding, product off-odor, barrel bulging, stratification and shelf-life shortening. Traditional solid preservatives need pre-dissolution and extra solvent support; common single-component liquid biocides have narrow antibacterial spectrum, poor thermal tolerance, high free formaldehyde content or bad compatibility with surfactants. Many high-end cosmetic and industrial aqueous products demand one-step, low-cost, easy-to-dose liquid preservatives with stable long-term antibacterial performance.
Against this market demand background, DMDMH 55%—a ready-to-use 55% active hydantoin-based liquid preservative—has become the mainstream universal anti-microbial raw material globally. It adopts water as solvent, no additional dissolution required, featuring broad-spectrum sterilization, mild low free formaldehyde, wide pH & temperature adaptability, excellent formula compatibility and outstanding cost efficiency, delivering simple, stable and reliable anti-corrosion solutions for all water-based industries.
DMDMH 55% is a stable aqueous solution of 1,3-Dimethylol-5,5-Dimethylhydantoin (INCI: DMDM Hydantoin, CAS: 6440-58-0), with pure DMDMH molecular formula C₇H₁₂N₂O₄, molecular weight 188.18 g/mol. It is processed by precise synthesis and dilution to standard 55% active concentration, with core physical-chemical indicators as follows:
Active DMDMH content: 55±2% (54%–56%), water content 44%–46%; total formaldehyde 17.0%–19.0%, free formaldehyde ≤1.0%, methanol ≤0.5%. Zero heavy metal residues, meets cosmetic-grade & industrial preservative dual standards, compliant with IECSC, EINECS, TSCA and global cosmetic regulatory limits.
Appearance: Colorless transparent liquid with faint mild aldehyde odor; specific gravity (20℃): 1.14–1.18 g/mL, pH of raw liquid 6.0–7.5. Fully miscible with water, ethanol, propylene glycol and glycerin; can be directly added to aqueous formulas without heating or pre-dissolution, simplifying factory production procedures.
Stable under 80℃ processing temperature, suitable for low & medium-temperature emulsification, textile sizing and coating grinding processes; applicable pH range 4.0–9.0, maintains complete antibacterial activity in acidic, neutral and weakly alkaline waterborne systems. Freezing point -11℃, avoid long-term storage below 15℃ to prevent temporary crystal precipitation (crystals redissolve after gentle warming without activity loss).
Perfectly compatible with anionic, nonionic, amphoteric surfactants, plant extracts, thickeners, acrylic emulsions and protein raw materials. No stratification, flocculation, whitening or discoloration after addition; does not damage product transparency, fragrance or skin feel, no negative impact on finished product appearance.
DMDMH 55% retains the unique cyclic hydantoin slow-release molecular structure of pure DMDMH powder, realizing dual anti-microbial effects for long-term protection:
1. Slow-release active hydroxymethyl groups penetrate the cell walls of bacteria, mold and yeast, irreversibly destroy microbial protein and nucleic acid synthesis pathways, block cell division and reproduction, fundamentally eliminate spoilage sources like Escherichia coli, Staphylococcus aureus, Candida albicans and Aspergillus niger.
2. The steric hindrance cyclic skeleton controls the sustained release rate of antibacterial active substances, avoiding instant high-concentration irritation and rapid activity depletion, achieving 6–12 months continuous anti-corrosion efficacy in finished products. Different from high-free-formaldehyde cheap preservatives, our DMDMH 55% strictly controls free formaldehyde below 1%, with mild stimulation, no corrosiveness to equipment and raw materials, can be used alone or compounded with IPBC, MIT, parabens for synergistic broad-spectrum sterilization, reducing total preservative dosage and overall formulation cost.
As a ready-to-add liquid broad-spectrum preservative, DMDMH 55% covers cosmetics, daily washing, textile, coating and industrial aqueous auxiliary industries with clear low addition dosage:
Ideal for both rinse-off and leave-on products: shampoo, body wash, hair conditioner, facial lotion, cream, toner, mask essence, hand sanitizer, wet wipes and mild fragrance care products. Effectively inhibit cosmetic microbial contamination, prevent peculiar smell, yellowing and mold growth, extend shelf life while complying with EU & US cosmetic maximum allowable usage limit of 0.6%.
Add to textile sizing slurry, printing paste, fabric softener and chemical fiber oil agent; restrain bacterial reproduction during slurry storage and textile processing, avoid sticky odor and mold spots on grey fabrics and finished textiles, guarantee long-term warehouse storage stability.
Used in water-based latex paint, water-based wood coating, acrylic emulsion, water-based ink and environmental glue; suppress anaerobic bacteria and fungi inside paint barrels, prevent acidification, gas generation and mold floating, avoid post-construction film mildew, extend paint storage cycle and film anti-fouling performance.
Applicable to laundry liquid, dishwashing detergent, floor cleaner, industrial degreaser and multi-purpose cleaning stock solution; prevent microbial spoilage of concentrated cleaning raw liquid, eliminate mucus and odor during subpackage storage.
Paper-making wet-end additives, leather water-based tanning agents, plant water extracts, low-concentration industrial circulating water anti-slime treatment, all suitable for long-term anti-corrosion preservation of water-containing organic raw materials.
*Ready-to-use liquid form, no weighing, dissolving and stirring procedures; eliminate undissolved powder agglomeration risk, greatly save factory labor and production time cost.
*Precisely standardized 55% concentration, stable batch-to-batch active content, avoid human weighing errors causing insufficient anti-corrosion or excessive addition.
*Low viscosity fluid, convenient pumping and automatic feeding for large-scale continuous production lines.
*Wider full-spectrum antibacterial coverage: effective against bacteria, yeast and mold simultaneously, while MIT/CMIT only target bacteria with weak anti-fungal capacity.
*Broader temperature & pH adaptability: stable up to 80℃, works across pH 4–9; isothiazolinones decompose under high temperature and alkaline conditions with rapid efficacy loss.
*Lower comprehensive cost: low recommended dosage, can be compounded with other preservatives to reduce total additive amount; single material matches multiple production lines, cut raw material procurement inventory.
*No discoloration risk: colorless liquid raw material, will not turn finished products yellow or dark, suitable for transparent essence, white cream and light-colored coatings.
Controlled ultra-low free formaldehyde, passed cosmetic-grade safety detection; produced under full closed-loop purification & dilution process, consistent liquid clarity and active content between batches, no stratification or precipitation during long-term storage of finished barrels.
As a professional manufacturer integrating R&D, synthesis and fine dilution of hydantoin preservatives, DALIAN SINOBIO CHEMISTRY CO., LTD. provides high-stability standard DMDMH 55% liquid preservative for global customers.
1. Advanced multi-stage purification & constant-concentration dilution technology, strictly lock active content at 55±2%, free formaldehyde ≤1.0%, far superior to general industrial-grade liquid DMDMH on the market.
2. Complete quality inspection system: each batch carries full test report including active content, pH, free formaldehyde and microbial limit.
3. Customized service: provide targeted formulation dosage guidance and anti-corrosion technical schemes for cosmetics, textile, coating and detergent manufacturers; support small sample testing and bulk 25kg plastic drum stable supply chain.
4. Comprehensive after-sales service, timely solve formula compatibility and storage stability problems for customers, supply one-stop fine chemical preservative raw material solution.
For any inquiries, samples or quotation requests, please feel free to contact us.
