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EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

SMALL SPILLS AND LEAKAGE: If you spill this chemical, you should dampen the solid spill material with water, then transfer the dampened material to a suitable container. Use absorbent paper dampened with water to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Wash all contaminated surfaces with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.

RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter. (NTP, 1992)

On the basis of the data included in this report, the CIR Expert Panel concludes that 2,4-Diaminophenol and 2,4-Diaminophenol Dihydrochloride are safe for use in hair dyes at concentrations up to 0.2% (as the free base). 2009 RE-REVIEW - The Expert Panel noted that 2,4-Diaminophenol Dihydrochloride is now termed 2,4-Diaminophenol Hydrochloride.

Safe for use in cosmetics, with qualifications

On the basis of the data included in this report, the CIR Expert Panel concludes that 2,4-Diaminophenol and 2,4-Diaminophenol Dihydrochloride are safe for use in hair dyes at concentrations up to 0.2% (as the free base). 2009 RE-REVIEW - The Expert Panel noted that 2,4-Diaminophenol Dihydrochloride is now termed 2,4-Diaminophenol Hydrochloride.

Safe for use in cosmetics, with qualifications

The following link will take the user to the National Toxicology Program (NTP) Test Agent Search Results page, which tabulates all of the "Standard Toxicology & Carcinogenesis Studies", "Developmental Studies", and "Genetic Toxicity Studies" performed with this chemical. Clicking on the "Testing Status" link will take the user to the status (i.e., in review, in progress, in preparation, on test, completed, etc.) and results of all the studies that the NTP has done on this chemical. [http://ntp-apps.niehs.nih.gov/ntp_tox/index.cfm?fuseaction=ntpsearch.searchresults&searchterm=137-09-7]

SEE PHENYLENEDIAMINE. PRODUCES SEVERE LOCAL REACTIONS & SYSTEMIC EFFECTS FROM PERCUTANEOUS ABSORPTION & FROM INGESTION. LOCAL ACTIONS INCLUDE SEVERE DERMATITIS & URTICARIA; IN THE EYE, CHEMOSIS, LACRIMATION, EXOPHTHALMOS, OPHTHALMIA, & EVEN PERMANENT BLINDNESS. SYSTEMIC ACTIONS INCLUDE ASTHMA, GASTRITIS (REGARDLESS OF PORTAL OF ENTRY), RISE IN BLOOD PRESSURE, TRANSUDATION INTO SEROUS CAVITIES, VERTIGO, TREMORS CONVULSIONS, & COMA. /PHENYLENEDIAMINE/

2,4-Diaminophenol Dihydrochloride

TR-401: NTP Technical Report on the Toxicology and Carcinogenesis Studies of 2,4-Diaminophenol Dihydrochloride (CASRN 137-09-7) in F344/N Rats and B6C3F1 Mice (Gavage Studies) (1992 )

03/11/91

No Evidence

No Evidence

Some Evidence

2,4-DIAMINOPHENOL DIHYDROCHLORIDE HAS BEEN TESTED BY IRRIGATING A RABBIT EYE WITH 0.02 MOLAR (PH 5.3) AQUEOUS SOLUTION FOR 10 MINUTES, AFTER REMOVAL OF THE CORNEAL EPITHELIUM TO FACILITATE PENETRATION. THIS PRODUCED DARK BROWN STAINING OF THE CORNEAL STROMA, PERMANENT CORNEAL OPACIFICATION, & VASCULARIZATION.

2,4-Diaminophenol dihydrochloride was evaluated for its mutagenic potential in the L5178Y TK+/TK- mouse lymphoma forward mutation assay using established procedures. Three experiments were conducted without metabolic activation. The dose levels tested in these experiments ranged from 0-4 ug/ml. Results from one experiment were discarded; however, significant mutagenic responses were obtained in the remaining two. Thus, 2,4-Diaminophenol dihyrochloride was positive in these tests and the lowest effective dose tested was 2 ug/ml.

... Conclusions: Under the conditions of these 2 yr gavage studies, there was no evidence of carcinogenic activity of 2,4-diaminophenol dihydrochloride in male or female F344/N rats that received 12.5 or 25 mg/kg. There was some evidence of carcinogenic activity of 2,4-diaminophenol dihydrochloride in male B6C3F1 mice based on incr incidences of renal tubule adenomas; there was no evidence of carcinogenic activity of 2,4-diaminophenol dihydrochloride in female B6C3F1 mice that received 19 or 38 mg/kg.

... Toxicology and carcinogenesis studies were conducted by administering 2,4-diaminophenol dihydrochloride (greater than 97% pure) in corn oil by gavage to F344/N rats and B6C3F1 mice for ... 2 years. ... 2 Yr Studies: The 2 yr studies were conducted by administering 2,4-diaminophenol dihydrochloride in corn oil by gavage to groups of 60 male and 60 female F344/N rats and B6C3F1 mice. ... Rats received doses of 0, 12.5, or 25 mg/kg; mice received doses of 0, 19, or 38 mg/kg. Conclusions: Under the conditions of these 2 yr gavage studies, there was no evidence of carcinogenic activity of 2,4-diaminophenol dihydrochloride in male or female F344/N rats that received 12.5 or 25 mg/kg. There was some evidence of carcinogenic activity of 2,4-diaminophenol dihydrochloride in male B6C3F1 mice based on incr incidences of renal tubule adenomas; there was no evidence of carcinogenic activity of 2,4-diaminophenol dihydrochloride in female B6C3F1 mice that received 19 or 38 mg/kg.