[
    {
        "identifier": {
            "cas": "678-9-1"
        },
        "molarweight": 32.08412,
        "model_record": {
            "a": 0.2
        }
    },
    {
        "identifier": {
            "cas": "123-4-5"
        },
        "molarweight": 16.0426,
        "model_record": {
            "a": 0.5
        }
    }
]