Monobenzone is a synthetic monobenzyl ether of hydroquinone and a topical depigmenting active pharmaceutical ingredient used in pharmaceutical and dermatological applications. It is primarily associated with the treatment of persistent depigmentation in extensive vitiligo.
Monobenzone acts on melanocytes and can produce long-lasting or permanent depigmentation of the skin. It is chemically distinct from hydroquinone and is generally used under medical supervision for specific dermatological indications.
Monobenzone is a specialized dermatological pharmaceutical API used in the development and manufacture of topical formulations.
Important API quality attributes include identity, assay, related substances, residual solvents, water content, residue on ignition and other applicable physicochemical parameters.
CAS Number: 103-16-2
Molecular Formula: C13H12O2
Molecular Weight: 200.23 g/mol
Chemical Name: 1-(Phenylmethoxy)-4-hydroxybenzene
Synonyms: Monobenzyl ether of hydroquinone, Hydroquinone monobenzyl ether, MBEH
Drug Class: Depigmenting Agent
Therapeutic Class: Dermatological Agent
Therapeutic Area: Dermatology
Molecule Type: Synthetic Small Molecule
Monobenzone produces depigmentation through effects on melanocytes. Its activity is associated with the formation of reactive metabolites that can cause melanocyte injury and loss, resulting in reduced melanin production.
Its pharmacological effects include:
Unlike temporary skin-lightening agents, monobenzone can produce permanent depigmentation, particularly with prolonged topical use.
Monobenzone API is used in pharmaceutical and dermatological development for:
Monobenzone is particularly associated with depigmentation therapy for patients with extensive vitiligo, where achieving a more uniform skin color may be considered when repigmentation is not practical.
Because depigmentation can be permanent and treatment can affect untreated areas, monobenzone-containing products require appropriate medical and dermatological oversight.
Monobenzone is generally described as a white to off-white crystalline solid or powder. It has limited water solubility and is more soluble in selected organic solvents.
Physical characteristics such as particle size, polymorphic form and purity should be controlled according to the applicable API specification.
A controlled Monobenzone API manufacturing process may involve:
The exact manufacturing process and process parameters should be based on the validated manufacturing process and approved quality documentation.
Typical Monobenzone API testing may include:
Store Monobenzone API in a tightly closed container under controlled pharmaceutical storage conditions, protected from excessive heat, moisture and direct light. Final storage conditions should follow validated stability data and the approved API specification.
Monobenzone is relevant to research involving:
Monobenzone is a synthetic depigmenting pharmaceutical compound with CAS Number 103-16-2, molecular formula C13H12O2, and molecular weight 200.23 g/mol. It is the monobenzyl ether of hydroquinone and is primarily associated with dermatological depigmentation applications, particularly in extensive vitiligo.
| Parameter | Specification |
|---|---|
| Appearance | White crystalline powder or crystals |
| Identification | IR & HPLC compliant |
| Assay (HPLC) | 98.0% – 102.0% |
| Loss on Drying | NMT 1.0% |
| Residue on Ignition | NMT 0.5% |
| Heavy Metals | NMT 20 ppm |
| Individual Impurity | NMT 0.5% |
| Total Impurities | NMT 1.0% |
| Water Content | NMT 1.0% |
| Melting Point | 115–119°C |