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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Toxicological information

Direct observations: clinical cases, poisoning incidents and other

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Administrative data

direct observations: clinical cases, poisoning incidents and other
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
1987 / 1989
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Referenceopen allclose all

Reference Type:
The incidence of IgE and IgG antibodies to chlorhexidine
Layton GT, Stanworth DR & Amos HE
Bibliographic source:
Clin Experimen Allergy 19, 307–314
Reference Type:
The specificity of murine polyclonal and monoclonal antibodies to the haptenic drug chlorhexidine induced by chlorine-generated chlorhexidine-protein conjugates
Layton GT, Stanworth DR & Amos E
Bibliographic source:
Clin exp Immunol 69, 157-165

Materials and methods

Study type:
other: immunological study

Test material

Constituent 1
Chemical structure
Reference substance name:
EC Number:
EC Name:
Cas Number:
Molecular formula:
N',N'''''-hexane-1,6-diylbis[N-(4-chlorophenyl)(imidodicarbonimidic diamide)]

Results and discussion

Applicant's summary and conclusion

Executive summary:

The authors investigated the incidence of IgE and IgG antibodies to chlorhexidine by radio-allergosorbent technique (RAST) for IgE and enzyme linked immunosorbent assay (ELISA) for IgG and IgE using semi-chlorhexidine human serum albumin conjugates for both assays. Serum samples from Japanese patients having suffered from anaphylactic reactions and chlorhexidine exposed hospital staff from Japan and Great Britain as well as non-exposed patients were tested.

IgE antibodies to chlorhexidine were only detected in Japanese individuals with anaphylactic-type reactions to chlorhexidine, not in the other Japanese groups and not in the British hospital staff. In contrast, IgG antibodies to chlorhexidine were detected in sera of Japanese nurses and British hospital staff with regular contact to chlorhexidine.

The authors concluded that there was no evidence to suggest that the presence of serum IgG antibodies has any clinical relevance whatsoever and that further studies are needed for the determination of fine specificity of human IgE and IgG antibodies.