LIST OF SUBSIDIARIES OF ENTRX CORPORATION Metalclad Insulation Corporation Entrx Financial, Inc. Metalclad Environmental Contractors Eco-Metalclad, Inc. Ecosistemas del Potosi, S.A. de C.V. Consultoria Ambiental Total, S.A. de C.V. Confinamiento...

Exhibit 21

LIST OF SUBSIDIARIES OF ENTRX CORPORATION

Metalclad Insulation Corporation

Entrx Financial, Inc.

Metalclad Environmental Contractors

Eco-Metalclad, Inc.

Ecosistemas del Potosi, S.A. de C.V.

Consultoria Ambiental Total, S.A. de C.V.

Confinamiento Tecnico de Residuos Industriales, S.A. de C.V.