talcum


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talc

 [talk]
a native hydrous magnesium silicate, sometimes with a small amount of aluminum silicate; used as a dusting powder. The inhalation of talc is associated with a wide variety of respiratory disorders.

talc

(talk),
Native hydrous magnesium silicate, sometimes containing small proportions of aluminum silicate, purified by boiling powdered talc with hydrochloric acid in water; used in pharmacy as a filter aid, as a dusting powder, and in cosmetic preparations.
[Ar. talq]
References in periodicals archive ?
Talcum powder is made from talc, a mineral made up mainly of the elements magnesium, silicon, and oxygen.
In addition to talc exposures from talcum powders, there has been occupational and hobby exposure to industrial talc in the United States, but the number of persons with exposures to industrial talc is small compared with the 100 million users of baby and body powders.
The link between talcum powder and ovarian cancer was suggested after researchers noticed that a majority of the ovarian tumors they studied contained talc particles.
The purposes of this paper are (1) to describe a new method of enhancing the visibility of fine features of the tiny webs, using Oecobius concinnus Simon, 1893 (Oecobiidae) as an example; and (2) to compare it with the talcum powder coating method (Eberhard et al.
Findings from studies in women that examined the possible link between talcum powder and ovarian cancer were mixed, with some studies showing a slightly increased risk.
Chief Inspector Armstrong said: "Interestingly but alarmingly we also had substances deposited that people had bought believing them to be drugs that were actually things like talcum powder or cement dust.
"Interestingly, we have also had substances deposited that people had obviously bought believing them to be drugs that were actually things like talcum powder or cement dust and not drugs at all.
The Food and Drug Administration (FDA) disseminated an Association of Southeast Asian Nations (ASEAN) advisory on the use of talcum powders in children, reiterating "that it must be labeled with a warning that states "keep powder away from children's nose and mouth."
Minister of Trade and Industry Tarek Kabil issued a decision to keep current export duties unchanged for a number of mining materials, including talcum powder, quartz and feldspar, blocks of marble, granite, and sand for a year, starting 10 February.
Echeverria's lawyers argued that Johnson & Johnson deliberately refrained from putting up a warning label on their products regarding the harmful effects of its talcum powder on ovaries, and instead continued to encourage women to use it for their personal hygiene.