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  <xs:element id="bcpc_LesseeOperatingLeaseTrancheThreeMember" abstract="true" name="LesseeOperatingLeaseTrancheThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="bcpc_ChemogasDefinedPensionPlanMember" abstract="true" name="ChemogasDefinedPensionPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="bcpc_ShareBasedCompensationArrangementByShareBasedPaymentAwardHoldingPeriodOfGrants" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardHoldingPeriodOfGrants" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
</xs:schema>
