South Australia's education chief has left open the option of removing all coloured sand products from public schools regardless of their brand, as the number of sites that have reported stocking items linked to an asbestos scare climbs above 350.

At about 140 of those schools and preschools — a full list of which has been posted on the Education Department's website — the sand has been reported as "loose", but the department said it had already been removed from several sites.

Asbestos expert says coloured sand poses 'very low risk'

Dozens of schools remain closed in the ACT, Tasmania and South Australia today as the clean-up and disposal of potentially asbestos-laced coloured sand continues. What risk does it actually pose?

According to the department, the sand has either been secu

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