Imported children's clothing from well-known fashion brands, including H&M, GAP and Mothercare, logged the most failures in safety tests in the first quarter of this year, the country's product-quality watchdog announced.

The General Administration of Quality Supervision, Inspection and Quarantine found 1,848 batches of unqualified imported children's and infant's clothing in the first quarter, Lu Chunming, spokesman for the administration, said at a news conference on Thursday.

The amount of formaldehyde in the material, pH scale and colorfastness were the most common problems.

Other brands, including French luxury label Dior, were also found with problems in their pH scale, as well as unqualified labeling of fiber composition.

Meanwhile, children's and infant's clothing products that were imported from Bangladesh were found with the most severe problems, followed by Turkey, Cambodia and Vietnam.