ROUTES OF ENTRY
B = Enters blood stream readily by Inhalation or Breathing of mist, dust or vapor.
S =
Substance can be absorbed into the body by contact with Skin or Eyes.
I  =
Chance of Ingestion by incidental oral contact, mouth breathing of mist, dust or vapor.
ALL =
Material is pervasive and retentive. Every route of entry is possible.

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