IMHO, Pak :-)

Menurut pendapat saya, kata "hazardous" dan "dangerous" tidak ada bedanya dalam Bahasa Indonesia. Jika digunakan untuk terjemahan sehari-hari, saya rasa dapat diartikan sebagai "berbahaya" saja.

hazardous substances = Bahan (kimia) berbahaya.


Penjelasan secara ilmiah dapat dilihat pada link referensi di bawah.
"Q: What is the difference between 'hazardous materials', 'dangerous goods' and 'hazardous substances'?
A: ‘Hazardous materials’ is an umbrella term used to describe any substance that, because of its chemical, physical or biological properties, can cause harm to people, property or the environment. It is a term that collectively describes substances which are classified according to the hazard they present, including but not limited to ‘dangerous goods’, ‘combustible liquids’, and ‘hazardous substances’.

Dangerous goods and hazardous substances are classified according to different criteria.

Dangerous goods are classified on the basis of immediate physical or chemical effects such as fire, explosion, corrosion and poisoning that may affect property, people or the environment (e.g. petrol, pool chlorine, and some pesticides).

Hazardous substances are classified only on the basis of health effects - both medium and long term - particularly in relation to workplaces.

Many materials are both dangerous goods and hazardous substances."

Semoga membantu ^^

mengancam berarti juga mengandung, membawa, menimbulkan, menghadirkan, memaparkan kepada, mengundang ancaman.

Racun adalah dangerous - langsung membahayakan. Bahan2 karsinogenik -- misalnya MSG -- adalah hazardous. Bahaya timbul setelah jangka panjang atau jumlah tertentu.

Pada manual Kesehatan & Keselamatan Kerja (K3), hazard sering kali dipadankan dengan ancaman bahaya. Jadi, sesungguhnya hazardous dan dangerous itu dekat sekali.