Link to FDA Code of Federal Regulations for Carrageenan:
http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRS...
http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRS...
http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRS...
http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRS...
http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRS...
http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRS...

Carrageenan and its Calcium, Potassium and Sodium salts may be used in cosmetics and personal care products marketed in Europe according to the general provisions of the Cosmetics Directive of the European Union.
Link to the EU Cosmetics Directive:
http://ec.europa.eu/consumers/sectors/cosmetics/documents/di...

The Joint Expert Committee on Food Additives (JECFA) advising the World Health Organization has concluded the following with respect to Carrageenan: “These closely related polysaccharides are very little absorbed when ingested by several species. The available short- and long-term studies support the safety of these materials despite the small numbers of subjects employed. Carrageenan has a long history of human use without known ill-effect.” http://www.inchem.org/documents/jecfa/jecmono/v46aje42.htm
http://www.inchem.org/documents/jecfa/jeceval/jec_377.htm

The International Agency for Research on Cancer (IARC) has classified native Carrageenan, which is used in food, as unclassifiable as to its carcinogenicity to humans. Degraded Carrageenan has been classified as possibly carcinogenic to humans. A JECFA monograph indicates that degraded Carrageenan is prepared from the extract of a specific species of seaweed, Eucheuma spinosum by partial hydrolysis using dilute hydrochloric acid and that this material is not used in food.
Link to the IARC summary:
http://monographs.iarc.fr/ENG/Monographs/vol31/volume31.pdf
Link to the JECFA monograph:
http://www.inchem.org/documents/jecfa/jecmono/v19je05.htm