The value and benefit of using
POLYLINK when searching for
polymers
The POLYLINK command in the CAS REGISTRY file collects the relevant monomer-based and
structural repeating unit (SRU)-based CAS Registry Number (CAS RN) for a condensation polymer
or a set of condensation polymers together into a single REGISTRY answer set. The POLYLINK
command is also useful when searching for polymers prepared by ring-opening polymerization.
The POLYLINK command is not applicable to vinyl or addition polymers.
Search Example: Condensation polymer search to find the CAS RN for the polyester prepared
from ethylene glycol and isopthalic acid.
=> FILE REGISTRY
=> EXPAND ETHYLENE GLYCOL-ISOPHTHALIC ACID COPOLYMER/CN 5
E1
1
ETHYLENE GLYCOL-ISOPHORONEDIISOCYANATE-POLYTETRAMETHYLENE
GLYCOL-M-PHENYLENEDIAMINE COPOLYMER/CN
1
ETHYLENE GLYCOL-ISOPHORONEDIISOCYANATE-PROPYLENE GLYCOL BLOCK
COPOLYMER/CN
1 --> ETHYLENE GLYCOL-ISOPHTHALIC ACID COPOLYMER/CN
1
ETHYLENE GLYCOL-ISOPHTHALIC ACID COPOLYMER METHACRYLATE/CN
1
ETHYLENE GLYCOL-ISOPHTHALIC ACID COPOLYMER METHACRYLATE-STYRENE
COPOLYMER/CN
E2
E3
E4
E5
Use the EXPAND command in STN to locate a Chemical Name (CN) for the copolymer.
Save a step. Combine SEARCH and DISPLAY
commands on one line.
=> SEARCH E3; DISPLAY
L1
1
L1
RN
ED
CN
CN
CN
CN
CN
CN
CN
CN
CN
MF
CI
PCT
LC
"ETHYLENE GLYCOL-ISOPHTHALIC ACID COPOLYMER"/CN
ANSWER 1 OF 1 REGISTRY COPYRIGHT 2011 ACS on STN
26810-06-0 REGISTRY
Entered STN: 16 Nov 1984
1,3-Benzenedicarboxylic acid, polymer with 1,2-ethanediol (CA INDEX NAME)
OTHER CA INDEX NAMES:
1,2-Ethanediol, polymer with 1,3-benzenedicarboxylic acid (9CI)
Ethylene glycol, polyester with isophthalic acid (8CI)
Isophthalic acid, polyester with ethylene glycol (8CI)
OTHER NAMES:
1,2-Ethanediol-isophthalic acid copolymer
1,3-Benzenedicarboxylic acid-ethylene glycol copolymer
Ethylene glycol-isophthalic acid copolymer
Ethylene glycol-isophthalic acid polymer
Poly(ethylene isophthalate)
(C8 H6 O4 . C2 H6 O2)x
PMS, COM
Polyester, Polyester formed
STN Files:
CA, CAPLUS, CHEMLIST, IFICDB, IFIPAT, IFIUDB, TOXCENTER,
USPAT2, USPATFULL, USPATOLD
Other Sources:
NDSL**, TSCA**
(**Enter CHEMLIST File for up-to-date regulatory information)
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
CRN
CMF
121-91-5
C8 H6 O4
HO2C
CM
**RELATED POLYMERS AVAILABLE WITH POLYLINK **
means that you can use the POLYLINK command to find
the CAS RN for the SRU (and possibly other sets or
monomers leading to the same final structure).
CO2H
2
CRN
CMF
HO
107-21-1
C2 H6 O2
CH2
CH2
OH
**PROPERTY DATA AVAILABLE IN THE 'PROP' FORMAT**
349 REFERENCES IN FILE CA (1907 TO DATE)
9 REFERENCES TO NON-SPECIFIC DERIVATIVES IN FILE CA
349 REFERENCES IN FILE CAPLUS (1907 TO DATE)
=> PLINK L1
L2
PLINK is a shortcut for POLYLINK.
16 POLYLINK L1
=> D SCAN L2
L2
IN
16 ANSWERS REGISTRY COPYRIGHT 2011 ACS ON STN
1,3-Benzenedicarboxylic acid, diethenyl ester, polymer with 1,2ethanediol (9CI)
(C12 H10 O4 . C2 H6 O2)x
PMS
MF
CI
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
H2C
CM
PLINK is a valuable command
that can locate unanticipated
records in CAS REGISTRY. In this
example, PLINK retrieved 15
additional related REGISTRY
numbers. Using D SCAN, we see
the variety of methods used to
make this polymer - including
some we did not anticipate!
1
CH
O
C
C
O
O
O
CH
CH2
2
HO
CH2
CH2
OH
HOW MANY MORE ANSWERS DO YOU WISH TO SCAN? (1):8
L2
IN
MF
CI
16 ANSWERS REGISTRY COPYRIGHT 2011 ACS on STN
1,3-Benzenedicarbothioic acid, S,S-bis(2-benzothiazolyl) ester, polymer
with 1,2-ethanediol (9CI)
(C22 H12 N2 O2 S4 . C2 H6 O2)x
PMS
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
N
S
O
O
C
C
S
S
S
CM
2
HO
L2
IN
MF
CI
N
CH2
CH2
OH
16 ANSWERS REGISTRY COPYRIGHT 2011 ACS on STN
1,3-Benzenedicarbonyl dichloride, polymer with 1,2-ethanediol (9CI)
(C8 H4 Cl2 O2 . C2 H6 O2)x
PMS
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
HO
CM
CH2
CH2
OH
2
O
Cl C
O
C Cl
L2
IN
MF
CI
16 ANSWERS
REGISTRY COPYRIGHT 2011 ACS on STN
Poly(oxy-1,2-ethanediyloxycarbonyl-1,3-phenylenecarbonyl)
(C10 H8 O4)n
PMS, COM
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
O
O
C
C O
CH2
CH2
O
This is the SRU entry
n
**PROPERTY DATA AVAILABLE IN THE 'PROP' FORMAT**
L2
IN
MF
CI
16 ANSWERS
REGISTRY COPYRIGHT 2011 ACS on STN
1,3-Benzenedicarboxylic acid, polymer with 1,2-dichloroethane (9CI)
(C8 H6 O4 . C2 H4 Cl2)x
PMS
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
HO2C
CM
CO2H
2
Cl
L2
IN
MF
CI
CH2
CH2
Cl
16 ANSWERS REGISTRY COPYRIGHT 2011 ACS on STN
1,3-Benzenedicarboxylic acid, polymer with 1,3-dioxolan-2-one (9CI)
(C8 H6 O4 . C3 H4 O3)x
PMS
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
HO2C
CM
CO2H
2
O
O
O
L2
IN
MF
CI
16 ANSWERS REGISTRY COPYRIGHT 2011 ACS on STN
3,6,14,17-Tetraoxatricyclo[17.3.1.18,12]tetracosa-1(23),8,10,12(24),19,
21-hexaene-2,7,13,18-tetrone, homopolymer
(C20 H16 O8)x
PMS
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
O
O
O
O
This ring opens to form the desired polymer.
O
O
O
O
L2
IN
MF
CI
16 ANSWERS REGISTRY COPYRIGHT 2011 ACS on STN
1-Butanaminium, N,N,N-tributyl-, 1,3-benzenedicarboxylate (2:1), polymer
with 1,2-dibromoethane (9CI)
(C16 H36 N . 1/2 C8 H4 O4 . C2 H4 Br2)x
PMS
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
Br
CM
CH2
CH2
Br
2
CM
3
-O2C
CM
CO2-
4
n-Bu
N + Bu-n
n-Bu
n-Bu
L2
16 ANSWERS REGISTRY COPYRIGHT 2011 ACS on STN
IN
1,3-Benzenedicarboxylic acid, bis(2-hydroxyethyl) ester, homopolymer
(9CI)
MF
(C12 H14 O6)x
CI
PMS
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
HO
CH2
CH2
O
C
C
O
O
O
CH2
CH2
OH
This is the homopolymer
**PROPERTY DATA AVAILABLE IN THE 'PROP' FORMAT**
ALL ANSWERS HAVE BEEN SCANNED
The benefit of using PLINK to locate these additional Registry numbers is to increase recall of
relevant references in the HCAplus file.
=> FILE HCAPLUS; S L1; S L2
L3
L4
Multiple commands can be entered at one prompt
349 L1
436 L2
=> S L4 NOT L3
L5
87 L4 NOT L3
The PLINK set retrieves 87 additional answers
(a 24.9% increase in recall).
Search Example: Locate the CAS Registry Number for a ring-opening polymer prepared from
oxepane.
=> FILE REGISTRY
=> E OXEPANE, HOMOPOLYMER/CN 5
E1
E2
E3
E4
2
OXEPANE, HEPTOSEPTANOSIDE DERIV./CN
1
OXEPANE, HEXANOIC ACID DERIV./CN
1 --> OXEPANE, HOMOPOLYMER/CN
1
OXEPANE, HOMOPOLYMER, COMPD. WITH (3,5,12.ALPHA
.)-3,12-DIHYDROXYCHOLAN-24-OIC ACID/CN
1
OXEPANE, HYDRAZINE DERIV./CN
E5
=> S E3
L6
1 "OXEPANE, HOMOPOLYMER"/CN
=> D
L6
ANSWER 1 OF 1 REGISTRY COPYRIGHT 2011 ACS on STN
RN
33807-31-7 REGISTRY
ED
Entered STN: 16 Nov 1984
CN
Oxepane, homopolymer(CA INDEX NAME)
OTHER CA INDEX NAMES:
CN
Oxepane, polymers (8CI)
OTHER NAMES:
CN
Polyoxepane
MF
(C6 H12 O)x
CI
PMS, COM
PCT Polyether, Polyether formed
LC
STN Files:
CA, CAPLUS, USPATFULL
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
CRN
CMF
592-90-5
C6 H12 O
O
**PROPERTY DATA AVAILABLE IN THE 'PROP' FORMAT**
23 REFERENCES IN FILE CA (1907 TO DATE)
4 REFERENCES TO NON-SPECIFIC DERIVATIVES IN FILE CA
23 REFERENCES IN FILE CAPLUS (1907 TO DATE)
=> PLINK L6
L7
3 POLYLINK L6
=> D SCAN
L7
IN
MF
CI
3 ANSWERS
REGISTRY COPYRIGHT 2011 ACS on STN
Poly(oxy-1,6-hexanediyl), -hydro--hydroxy(C6 H12 O)n H2 O
PMS, COM
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
HO
(CH2)6
O
n
H
**PROPERTY DATA AVAILABLE IN THE 'PROP' FORMAT**
HOW MANY MORE ANSWERS DO YOU WISH TO SCAN? (1):2
L7
IN
MF
CI
3 ANSWERS REGISTRY COPYRIGHT 2011 ACS on STN
Oxepane, homopolymer
(C6 H12 O)x
PMS, COM
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
O
**PROPERTY DATA AVAILABLE IN THE 'PROP' FORMAT**
L7
IN
MF
CI
3 ANSWERS
REGISTRY COPYRIGHT 2011 ACS on STN
1,6-Hexanediol, homopolymer
(C6 H14 O2)x
PMS, COM
**RELATED POLYMERS AVAILABLE WITH POLYLINK**
CM
1
HO
(CH2)6
OH
ALL ANSWERS HAVE BEEN SCANNED
=> FILE HCAPLUS; S L6; S L7
L8
23 L6
L9
124 L7
=> S L9 NOT L8
L10
101 L9 NOT L8
Compare the crossover results of the search
for the oxepane homopolymer alone (L6)
against the PLINK (L7).
The PLINK answer set retrieved 101 additional
references - a 439 percent increase in recall!
Search Example: Locate the CAS Registry Number for an addition polymerization using a vinyl
polymer.
=> FILE REGISTRY
=> E POLY(VINYL BUTYRATE)/CN 5
E1
1
POLY(VINYL BUTYLCARBAMATE)/CN
E2
2
POLY(VINYL BUTYRAL)/CN
E3
1 --> POLY(VINYL BUTYRATE)/CN
E4
1
POLY(VINYL CAPRATE)/CN
E5
1
POLY(VINYL CAPROATE)/CN
=> S E3; D
L11
1 "POLY(VINYL BUTYRATE)"/CN
L11 ANSWER 1 OF 1 REGISTRY COPYRIGHT 2011 ACS on STN
RN
24991-31-9 REGISTRY
ED
Entered STN: 16 Nov 1984
CN
Butanoic acid, ethenyl ester, homopolymer (CA INDEX NAME)
OTHER CA INDEX NAMES:
CN
Butyric acid, vinyl ester, polymers (8CI)
OTHER NAMES:
CN
Poly(vinyl butyrate)
CN
Poly(vinyl n-butyrate)
CN
Vinyl butyrate homopolymer
CN
Vinyl butyrate polymer
MF
(C6 H10 O2)x
CI
PMS
PCT Polyvinyl
LC
STN Files:
AGRICOLA, CA, CAPLUS, CHEMCATS, CHEMLIST, CIN, IFICDB,
IFIPAT, IFIUDB, PIRA, TOXCENTER, USPAT2, USPATFULL, USPATOLD
Other Sources:
NDSL**, TSCA**
(**Enter CHEMLIST File for up-to-date regulatory information)
CM
1
CRN
CMF
123-20-6
C6 H10 O2
O
H2C
CH
O
C
Pr-n
**PROPERTY DATA AVAILABLE IN THE 'PROP' FORMAT**
261 REFERENCES IN FILE CA (1907 TO DATE)
11 REFERENCES TO NON-SPECIFIC DERIVATIVES IN FILE CA
261 REFERENCES IN FILE CAPLUS (1907 TO DATE)
Note the absence of **RELATED POLYMERS AVAILABLE WITH POLYLINK** line.
Because vinyl or addition polymers do not have SRU entries, related polymers
do not appear in the REGISTRY record. In this example, PLINK command for
vinyl or addition polymers will NOT retrieve additional REGISTRY database
records.