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Guanidine hydrochloride

CAS Number
50-01-1
EC Number
200-002-3
Chemical Formula
CH5N3.ClH
Molecular Weight
95.53 g/mol

Description

Guanidine hydrochloride (CAS 50-01-1 ), also known as guanidinium chloride or GuHCl, is a strong protein denaturant and chaotropic salt used across pharmaceutical, biotechnology, and life science manufacturing. It disrupts hydrogen bonding and hydrophobic interactions in proteins, making it a critical reagent wherever controlled protein unfolding or solubilization is required for industrial processes. In biopharmaceutical manufacturing, GuHCl is used to solubilize inclusion bodies during recombinant protein production, enabling downstream refolding into active drug substances for therapeutic use. Protein denaturation studies and urea-alternative unfolding assays rely on concentrated GuHCl solutions as the standard chaotropic agent. In nucleic acid extraction workflows, it lyses cells and inactivates RNases. This protects RNA and DNA integrity during isolation procedures. Cosmetic formulators use it at low concentrations as a conditioning and preservation-supporting agent in hair and scalp treatments. Guanidine hydrochloride is supplied as a white crystalline powder or granules. Standard commercial grades include high-purity reagent-grade and molecular biology-grade specifications suited to sensitive bioprocessing. Pharmaceutical-grade material meeting USP or Ph.Eur. standards is available for GMP-regulated manufacturing environments. These high-quality standards ensure consistency and safety in production. Contact us for supply of Guanidine hydrochloride Request Quote

Other Names (Synonyms)

GuHCl | GuCl | Guanidinium chloride | guanidine HCl | Aminoformamidine hydrochloride | GUANIDINE MONOHYDROCHLORIDE | Carbamidine hydrochloride | Aminomethanamidine hydrochloride

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point178 °C
Density1.3 g/cm³
AppearanceWhite cryst. powder
ColorWhite to slightly yellow
OdorOdorless
FormCrystals
Water Solubility2280 g/L (20 ºC)
Refractive Indexn 20/D 1.465
pH4.5-5.5 (100g/l, H2O, 20℃)

Safety & Handling

Warning
GHS07· Irritant

Hazard Statements

H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation

Precautionary Statements

P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29252000
Storage Class11 - Combustible Solids
WGK (Germany)1