Trade in Sydney-based hazardous waste management company Dolomatrix International Ltd rose 19 per cent in early trade today, on speculation of a merger between the company and Kwinana-based Tox Free Solutions Ltd.

Trade in Sydney-based hazardous waste management company Dolomatrix International Ltd rose 19 per cent in early trade today, on speculation of a merger between the company and Kwinana-based Tox Free Solutions Ltd.