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Precious Metals Recovery LLC RCRA Permit Application Dry Hills ...

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1. Identification<br />

Material Name: Calomel (Mercurous Chloride) with Sulfuric Acid<br />

CAS Nos. 10112‐91‐1 (Mercurous Chloride), 7664‐93‐9 (Concentrated Sulfuric Acid)<br />

Chemical Formula(s): Mercurous Chloride (Hg2Cl2), Sulfuric Acid (H2SO4)<br />

Description: The calomel produced in the Barrick Goldstrike Roasting process is mercurous chloride<br />

(very low solubility) with sulfuric acid. The material is a corrosive, toxic material that separates into two<br />

distinct phases when allowed to settle. Sulfuric acid (specific gravity = 1.841), containing a small amount<br />

of mercury, will rise to the top in a container. The mercurous chloride (specific gravity = 7.15),<br />

containing some sulfuric acid, will settle to the bottom.<br />

2. Hazard identification<br />

3. Composition/information on ingredient<br />

CAS# Chemical Name Percent EINECS/ELINCS<br />

10112‐91‐1 Mercurous chloride >99.5 231‐430‐9<br />

4. First-aid measures<br />

Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper<br />

and lower eyelids. Get medical aid.<br />

Skin: Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing<br />

contaminated clothing and shoes. Wash clothing before reuse.<br />

Ingestion: Call a poison control center. If swallowed, do not induce vomiting unless directed to do so by<br />

medical personnel. Never give anything by mouth to an unconscious person. Get medical aid.<br />

Inhalation: Remove from exposure and move to fresh air immediately. If breathing is difficult, give<br />

oxygen. Get medical aid. Do NOT use mouth‐to‐mouth resuscitation. If breathing has ceased apply<br />

artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.<br />

Notes to Physician: Treat symptomatically and supportively.<br />

Antidote: The use of Dimercaprol of BAL (British Anti‐Lewisite) as a chelating agent should be<br />

determined by qualified medical personnel.

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