Dichlorophene

Description

2,2'-Dihydroxy-5,5'-dichlorodiphenylmethane · CAS 97-23-4 · C13H10Cl2O2. UNII T1J0JOU64O. Melting Point: 351 to 352 °F (NTP, 1992); Melting Point: 177-178 °C; Melting Point: 178 °C.

Identification

CAS Registry Number	97-23-4
PubChem CID	3037
Molecular formula	C13H10Cl2O2
IUPAC name	4-chloro-2-[(5-chloro-2-hydroxyphenyl)methyl]phenol
UNII (FDA)	T1J0JOU64O

Computed Descriptors

Molecular Weight	269.12
XLogP3	4.3
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	2
Exact Mass	268.0057849
Monoisotopic Mass	268.0057849
Topological Polar Surface Area	40.5
Heavy Atom Count	17
Formal Charge	0

Physical & Chemical Properties

Melting Point	351 to 352 °F (NTP, 1992)
Melting Point	177-178 °C
Melting Point	178 °C
Solubility	In water, 30 mg/L at 25 °C
Vapor Pressure	9.75X10-11 mm Hg at 25 °C
LogP	log Kow = 4.26
LogP	4.26
Dissociation Constants	pKa1 = 7.60; pKa2 = 11.6

Physical description & handling notes

• Dichlorophene appears as white slightly cream or light pink-colored powder. Melting point 177 °C. Slight phenolic odor and a saline phenolic taste. Moderately toxic. Used as a fungicide and bactericide.
• White slightly cream or light pink-colored powder; [CAMEO]
• Colorless crystals
• Odorless
• less than 1 mg/mL at 72 °F (NTP, 1992)
• Sparingly sol in toluene; 1 g sol in 1 g of 95% ethanol, in less than 1 g of ether; sol in methanol, isopropyl ether, petroleum ether; sol (with decomp) in alkaline aq solutions

Regulatory Status

Regulatory & Food Contact	FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS 2,2'-DIHYDROXY-5,5'-DICHLOROPHENYLMETHANE (DICHLOROPHENE) CIR / INCI: Cosmetic ingredients (Dichlorophene) -> CIR (Cosmetic Ingredient Review) CIR / INCI: Antimicrobial; Deodorant

GHS Hazard Classification

Reported hazard statements	H302, H319, H400, H410, H226 (20.6%), H315 (20.6%), H332 (21%), H335 (20.6%)

Documented Uses

• Used as a veterinary fungicide, anthelmintic, and antiprotozoan. [Merck Index # 3071] Used as a fungicide on negatives in photographic development; [Kanerva, p. 1637] Used as a biocide, algaecide, fungicide, and disinfectant (textiles, oilfield operations, cement additive, leather, paper, cutting oils, toothpaste, soaps, lawn furniture, dermatological products,
• Photographic Processing [Category: Other]
• Cement Producing [Category: Industry]
• Fungicide & bactericide used in treating textiles, leather & paper
• Agricultural fungicide; antimicrobial; germicide in soaps, shampoos.
• For more Uses (Complete) data for DICHLOROPHENE (14 total), please visit the HSDB record page.

Synonyms

Dichlorophen; dichlorophene; 97-23-4; Didroxane; Anthiphen; Parabis; Dicestal; Dichlorofen; Dichlorphen; Trivex; Teniathane; Didroxan; Teniatol; Hyosan; Antiphen; Cordocel

Frequently Asked Questions

What are the CAS number and molecular formula of 2,2'-Dihydroxy-5,5'-dichlorodiphenylmethane?

CAS 97-23-4; molecular formula C13H10Cl2O2; molecular weight — g/mol.

What other names is 2,2'-Dihydroxy-5,5'-dichlorodiphenylmethane known by?

Dichlorophen, dichlorophene, 97-23-4, Didroxane, Anthiphen, Parabis.

What is the regulatory status of 2,2'-Dihydroxy-5,5'-dichlorodiphenylmethane?

Documented regulatory listings: FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS; 2,2'-DIHYDROXY-5,5'-DICHLOROPHENYLMETHANE (DICHLOROPHENE); CIR / INCI: Cosmetic ingredients (Dichlorophene) -> CIR (Cosmetic Ingredient Review).

Is 2,2'-Dihydroxy-5,5'-dichlorodiphenylmethane classified as hazardous?

Hazard statements reported: H302, H319, H400, H410, H226.

What are the key physical properties of 2,2'-Dihydroxy-5,5'-dichlorodiphenylmethane?

Melting Point: 351 to 352 °F (NTP, 1992); Melting Point: 177-178 °C; Melting Point: 178 °C; Solubility: In water, 30 mg/L at 25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.