diff --git a/FourmiCrawler/sources/ChemSpider.py b/FourmiCrawler/sources/ChemSpider.py
index a62f6dd..332c036 100644
--- a/FourmiCrawler/sources/ChemSpider.py
+++ b/FourmiCrawler/sources/ChemSpider.py
@@ -47,7 +47,6 @@ class ChemSpider(Source):
         properties = []
 
         # Predicted - ACD/Labs tab
-        # [TODO] - test if tab contains data, some chemicals do not have data here
         td_list = sel.xpath('.//table[@id="acdlabs-table"]//td').xpath(
             'normalize-space(string())')
         prop_names = td_list[::2]
@@ -58,6 +57,12 @@ class ChemSpider(Source):
             prop_value = prop_value.extract().encode('utf-8')
             prop_conditions = ''
 
+            # Test for properties without values, with one hardcoded exception
+            if (not re.match(r'^\d', prop_value) or
+                    (prop_name == 'Polarizability' and
+                    prop_value == '10-24cm3')):
+                continue
+
             # Match for condition in parentheses
             m = re.match(r'(.*) \((.*)\)', prop_name)
             if m:
@@ -215,4 +220,4 @@ class ChemSpider(Source):
             return None
         searchurl = self.website[:-1] + self.search % compound
         log.msg('chemspider compound', level=log.DEBUG)
-        return Request(url=searchurl, callback=self.parse_searchrequest)
\ No newline at end of file
+        return Request(url=searchurl, callback=self.parse_searchrequest)