Federal Register / Vol. 58, No. 92 / Friday, May 14, 1993 / Rules and Regulations

(D) Concrete (excluding cementitious

or pozzolanic stabilized hazardous

wastes).

(E) Masonry and refractory bricks.

(F) Metal cans, containers, drums, or

tanks.

(G) Metal nuts, bolts, pipes, pumps,

valves, appliances, or industrial

equipment. (H Scrap metal as defined in 40 CFR

261.1(c)(6).

* .* r *t *

[FR Doc. 93-11322 Filed 5-13-93; 8:45 am]

MWNG CODE S-O-P

40 CFR Parts 712 and 716

[OPPTS-82040; FRL-4182-11

Preliminary Assessment Information

and Health and Safety Data Reporting;

Addition of Chemicals

AGENCY: Environmental Protection

Agency (EPA).

ACTION: Final rule.

SUMMARY: The Interagency Testing Committee (ITC) in its Thirtieth Report

to EPA revised the Toxic Substances

Control Act (TSCA) section 4(e) Priority List by recommending for testing two

chemical groups. There are no

designated or recommended with

intent-to-designate chemicals. The ITC

recommendations must be given priority

consideration by EPA in promulgating

test rules. EPA is adding the two

categories to two model informationgathering rules: The TSCA section 8(a)

Preliminary Assessment Information

Rule (PAIR) and the TSCA section 8(d)

Health and Safety Data Reporting Rule.

These model rules will require

manufacturers, importers, and

processors of the listed members of the

categories to report production, use,

exposure-related, and unpublished

health and safety data to EPA.

EFFECTIVE DATE: This rule will become

effective on June 14, 1993.

FOR FURTHER INFORMATION CONTACT:

Susan B. Hazen, Director, TSCA

Environmental Assistance Division (TS799), Office of Pollution Prevention and

Toxics, Environmental Protection

Agency, 401 M St., SW., Rm. E-543,

Washington, DC 20460, Telephone:

(202) 554-1404, TDD: (202) 554-0551.

SUPPLEMENTARY INFORMATION: This rule

adds two categories of substances to

both the PAIR and the section 8(d) ' Health and Safety Data Reporting Rule.

Manufacturers, processors, and

importers of these chemicals will be

required to report unpublished health

and safety data and/or end use,

exposure, and production volume data

to EPA.

This rule also corrects the CAS

numbers of two substances listed under

the section 8(d) rule. Under the

phenylenediamines category of

§ 716.120(c), the CAS number for 1,2-

benzenediamine, 5-chloro-3-nitro- is

incorrectly listed as 042389-30-0. It

should read 42389-30-0. Under the

alkyl phosphates category in

§ 716.120(d), the CAS number for

phosphoric acid, dibutyl ester is

incorrectly listed as 07-06-4. It should

read 107-66-4.

1. Background

Section 4(e) of TSCA established the

ITC and authorized it to recommend to

EPA chemical substances and mixtures

(chemicals) to be given priority

consideration in proposing test rules

under section 4. For some of these

chemicals, the ITC may designate that

EPA must respond to its

recommendations within 12 months. In

this time, EPA must either initiate a

rulemaking to test the chemical or

publish in the Federal Register its

reasons for'not doing so.

On May 29, 1992, EPA announced the

receipt of the Thirtieth Report from the

ITC. It was then published by EPA on

July 9, 1992 (57 FR 30608). The

Thirtieth Report revises the Committee's

priority list of chemicals by

recommending two categories to the

section 4(e) priority list (for a total of 60

chemical substances). This rule adds

two categories of substances to both the

PAIR and the section 8(d) Health and

Safety Data Reporting Rule. These two

rules are model information gathering

rules which assist EPA in responding to

the ITC recommendations.

EPA issued the PAIR under section

8(a) of TSCA (15 U.S.C. 2607(a)), and it

is codified at 40 CFR part 712. This

model section 8(a) rule establishes

standard reporting requirements for

manufacturers and importers of the

chemicals listed in the rule at 40 CFR

712.30. These manufacturers and

importers are required to submit a onetime report on general volume, end use,

and exposure-related information using

the Preliminary Assessment Information

Manufacturer's Report (EPA Form 7710-

35). EPA uses this model section 8(a)

rule to gather current information on

chemicals of concern quickly. EPA issued the model Health and

Safety Data Reporting Rule under

section 8(d) of TSCA (15 U.S.C.

2607(d)), and it is codified at 40 CFR

part 716. The section 8(d) model rule

requires past, current, and prospective

manufacturers, importers, and

processors of listed chemicals to submit

to EPA copies and lists of unpublished

health and safety studies on the listed

chemicals that they manufacture,

import, or process. These studies

provide EPA with useful information

and have provided significant support

for EPA's decision making under TSCA

sections 4, 5, 6, 8, and 9. These model

rules provide for the automatic addition

of ITC priority list chemicals. Whenever

EPA announces the receipt of an ITC

report, EPA may, at the same time

without further notice and comment,

amend the two model informationgathering rules by adding the

recommended chemicals. The

amendment adding these chemicals to

the PAIR and the Health and Safety Data

Reporting Rule becomes effective 30

days after publication. The ITC is

currently revising the recommended

chemicals identified in the 28th list of

ITC chemicals (56 FR 41212, August 19,

1991). The PAIR/8(d) rule adding these

chemicals will be published as soon as

EPA receives the amended list of

chemicals.

II. Chemicals To Be Added

In its Thirtieth Report to EPA, the ITC

recommended for priority consideration

two categories of substances; there are

no designated or recommended with

intent-to-designate chemicals. More

specifically, the ITC is recommending

for testing two categories of chemicals.

The two categories are siloxanes and

chloroalkyl phosphates. For a complete

listing of the substances, see the ITC's

Thirtieth Report published in the

Federal Register at 57 FR 30608

(December 30, 1991). EPA will not add

to the section 8(d) Health and Safety

Data Reporting Rule one substance

listed in the ITC report because the

substance is already on the section 8(d)

rule and subject to a 10-year reporting

period. This substance is:

octamethylcyclotetrasiloxane (CAS No.

556-67-2), (49 FR 46741, November 28,

1984).

III. Reporting Requirements

A. Preliminary Assessment Information

Rule

All persons who manufactured or

imported the chemical substances

named. in this rule during their latest

complete corporate fiscal year must

submit a Preliminary Assessment

Information Manufacturer's Report (EPA

Form No. 7710-35) for each

manufacturing or importing site at

which they manufactured or imported a

named substance. A separate form must

be completed for each substance and

submitted to the Agency no later than

August 12, 1993. Persons who have

previously and voluntarily submitted a

Manufacturer's Report to the ITC or EPA

.28511
Federal Register /Vol. 58, No. 92 / Friday, May 14, 1993 / Rules and Regulations

may be able to submit a copy of the

original Report to EPA or to notify EPA

by letter of their desire to have this

voluntary submission accepted in lieu

of a current data submission. See

§ 712.30(a)(3).

Details of the reporting requirements,

the basis for exemptions, and a facsimile

of the reporting form, are provided in 40

CFR part 712. Copies of the form are

available from the TSCA Environmental

Assistance Division at the address listed

under FOR FURTHER INFORMATION

CONTACT.

B. Health and Safety Data Reporting

Rule

Listed below are the general reporting requirements of the section 8(d) model

rule.

1. Persons who, in the 10 years preceding the date a substance is listed,

either have proposed to manufacture,

import, or process, or have

manufactured, imported, or processed,

the listed substance must submit to

EPA: A copy of each health and safety study which is in their possession at the

time the substance Is listed.

2. Persons who, at the time the

substance is listed, propose to

manufacture, import, or process; or are

manufacturing, importing, or processing

the listed substance must submit to

EPA:

a. A copy of each health and safety

study which is In their possession at the

time the substance is listed.

b. A list of health and safety studies

known to them but not in their

possession at the time the substance is

listed.

c. A list of health and safety studies

that are ongoing at the time the

substance is listed and are being

conducted by or for them.

d. A list of each health and safety

study that is initiated after the date the

substance is listed and is conducted by

or for them.

e. A copy of each health and safety

study that was previously listed as

ongoing or subsequently initiated and is

now complete-regardless of

completion date.

3. Persons who, after the time the

substance is listed, propose to

manufacture, import, or process the

listed substance must submit to EPA:

a. A copy of each health and safety

study which is in their possession at the

time they propose to manufacture,

import, or process the listed substance.

b. A list of health and safety studies

known to them but not in their

possession at the time they propose to

manufacture, import, or process the

listed substance.

c. A list of health and safety studies

that are ongoing at the time they

propose to manufacture, import, or

process the listed substance, and are

being conducted by or for them.

d. A list of each health and safety

study that is initiated after the time they

propose to manufacture, import, or

process the listed substance, and is

conducted by or for them.

e. A copy of each health and safety

study that was previously listed as

ongoing or subsequently initiated and is

now complete-regardless of the

completion date.

The bulk of reporting is required at

the time the substance is listed. Persons

described in categories I and 2 do all or

most of their health and safety data

reporting at the start of the reporting

period. The remaining reporting

requirements, specifically categories

2(d), 2(e), and 3, continue prospectively.

Detailed guidance for reporting

unpublished health and safety data Is

provided in the Federal Register of

September 15, 1986 (51 FR 32720). Also

found there are the reporting

exemptions.

C. Submission of PAIR Reports and

Section 8(d) Studies

PAIR reports and section 8(d) health

and safety studies must be sent to:

TSCA Document Processing Center (TS790), Office of Pollution Prevention and

Toxics, Environmental Protection

Agency, 401 M St., SW., Washington,

DC 20460, ATTN: (insert either PAIR or

8(d) Reporting).

D. Removal of Chemical Substances

from the Rules

Any person who believes that section

8(a) or 8(d) reporting required by this

rule is unwarranted, should promptly

submit to EPA in detail the reasons for

that belief. EPA, in its discretion, may

remove the substance from this rule for

good cause (40 CFR 712.30 and

716.105). When withdrawing a

substance from the rule, EPA will issue

a rule amendment for publication in the

Federal Register.

IV. Release of Aggregate Data

EPA will follow procedures for the

release of aggregate statistics as

prescribed in the Federal Register

notice of June 13, 1983 (48 FR 27041).

Included in the notice are procedures

for requesting exemptions from the

release of aggregate data. Exemption

requests concerning the release of

aggregate data on any chemical

substance must be received by EPA no

later than August 12, 1993.

V. Economic Analysis

A. Preliminary Assessment Information

Rule

EPA estimates the PAIR reporting cost

of this rule is $92,014. To calculate this

figure, EPA used information from a

variety of published sources as well as

information from RM1 reports on

similar chemicals to generate a list of 13

firms that manufacture and/or import

the 60 chemicals at a total of 14 sites.

The published sources used include:

SRI International's Directory of

Chemical Producers, Chemical

Economics Handbook, and Specialty

Chemicals; other multiclient studies; the

U.S. International Trade Commission's

Synthetic Organic Chemicals; and

company product literature. An

unknown number of the businesses

affected by the addition of the chemicals

to the Priority List may qualify as a

small business as defined in 40 CFR

712.25(c). However, for this analysis it

is assumed that all firms identified will

report. Therefore, EPA expects 13 firms

to generate a total of 89 reports (some

sites produce more than one of the 60

chemicals).

Reporting costs (dollars)

(a) 89 reports estimated at $914 per report ................................................................................. (b) 14 sites at $762 per site .........................................................................................................

Total cost .........................................................

Mean cost per site: $92,014/14 sites .......................................................................................................... Mean cost per firm: $92,014/13 firns ........................................................................................................

Reporting burden (hours)

(a) Rule familiarization: 18 h/site X,14 sites . ... .............................................................

(b) Reporting: 16 Wreport X 89 reports ......................... . . . ..........................

$81,346

$10,668

$92,014

$6,572

$7,078

252 h

424 h

28512
Federal Register / Vol. ,58, No. 92 / Friday, May 14, 1993 / Rules and Regulations

Tots) bu rden hours ...................................................................................................................................... 676 h

Average burden per site at 1,676 h/13 sites ............................................................................................. 20 h

Average burden per firm at 1,676 h/13 firms .............................................................................................. 129 h

EPA costs (dollars):

Processing cost . 89 reports at $95/report .................................................................................. $8,455

B. Health and Safety Data Reporting Rule

EPA estimates the total reporting costs for establishing section 8(d) reporting requirements for 60 chemicals Will

be $94,461. This cost estimate is high because the Agency is uncertain about the likely number of respondents to

the rule. Although EPA has used the best available data to make its economic projections, much of the information

is based upon the 1986 TSCA Inventory Update and secondary information from industry sources. Therefore, EPA

tends to overestimate rather than underestimate reporting burden. The estimated reporting costs are broken down as

follows:

Initlal corporate review ......................................................................................................................

Site Identification .........................................................................................................................................

File searches at site ....................................................................................................................................

Photocopying existing studies ................................................................................................................

Title listing ...................................................................................................................................................

Managerial review for CBI ..................................................................................................................

Reporting on newly-initlated studies ..........................................................................................................

Submissions after initial reporting period ....................................................................................................

Total ............................................................... 0.......................................................................................

Reporting burden (hours)

(a)InWal review: 2 h/firm X 36 firms .............................................................................................. (b) Reporting: 24.4 h/firm X 48 firms .............................................................................................

Total reporting burden hours

$ 4,053

6,079

12,499

9,660

633

56,273

273

4,748

$95,557

72 h

2,263 h

2,341 h

The following documents constitute

the record for this rule (docket control

number OPPTS-82040). All of these

documents are available to the public in

the TSCA Public Docket Office from 8

a.m. to 12 noon and I p.m. to 4 p.m.,

Monday through Friday, excluding legal

holidays. The TSCA Public Docket

Office Is located at EPA Headquarters,

Rm. NE-G004, 401 M St., SW.,

Washington, DC.

1. This final rule.

2. The economic analysis for this rule.

3. The Thirtieth Report of the ITC.

VI. Regulatory Assessment

Requirements

A. Executive Order 12291

Under Executive Order 12291, EPA

must judge whether a regulation is "major" and, therefore, subject to the

requirement of a Regulatory Impact

Analysis. This rule is not major because

it will not result in an effect on the

economy of $100 million or more, an

increase in costs or prices, or any of the

adverse effects described in the

Executive Order.

This amendment was not submitted to

the Office of Management and Budget

(OMB) for review, because the

automatic listing of substances

recommended by the ITC is provided for

in 40 CFR 712.30(c) and 716.18(b).

B. Paperwork Reduction Act

The information collection

requirements contained in this rule have

been approved by OMB under the

provisions of the Paperwork Reduction

Act of 1980, 44 U.S.C. 3501 et seq. and

have been assigned OMB control

numbers 2070-0054 for PAIR reporting

and 2070-0004 for TSCA section 8(d)

reporting. Public reporting burden for this

collection of information is.estimated to

average 19 hours for PAIR per response

and 60.72 hours for section 8(d),

including time for reviewing

instructions, searching existing data

sources, gathering and maintaining the

data needed, and completing and

reviewing the collection of information.

Send comments regarding the burden

estimate or any other aspect of this

collection of information, including

suggestions for reducing this burden, to

Chief, Information Policy Branch, PM223, U.S. Environmental Protection

Agency, 401 M St., SW., Washington,

DC, 20460; and to the Office of

Information and Regulatory Affairs,

Office of Management and Budget,

Washington, DC 20503, marked

"Attention: Desk Officer for EPA."

List of Subjects in 40 CFR Parts 712 and

716

Chemicals, Environmental protection,

Hazardous substances, Health and safety

data, Recordkeeping and reporting

requirements.

Dated: May 5, 1993.

Charles M. Auer,

Director, Chemical Control Division, Office

of Pollution Prevention and Toxics.

Therefore, 40 CFR Chapter I is

amended as follows:

PART 712-[AMENDED]

1. In Part 712:

a. The authority citation for part 712

continues to read as follows:

Authority: 15 U.S.C. 2607(a).

b. Section 712.30 is amended by

adding two categories alphabetically in

paragraph (x) to read as follows:

§712.30 Chemical lists and reporting

periods.

* * * 

(X) * * *

28513
28514 Federal Register / Vol. 58, No. 92 / Friday, May 14, 1993 I Rules and Regulations

CAS No. Substance Effective Reportn date date

Chloralkyl phosphates

34621-99-3 ......

38051-10-4 ...... 53461-82-8 ...... 76649-15-5 ......

Siloxanes

107-46-0 .......... 107-50-6 .......... 107-51-7 .......... 107-52-8 .......... 107-53-9 .......... 141-62-8 .......... 141-63-9 .......... 540-97-6 .......... 541-01-5 .......... 541-02-6 .......... 541-05-9 ..........

546-56-5 ..........

556-67-2 .......... 556-68-3 .......... 556-69-4 ..........

556-70-7 .......... 556-71-8 ..........

999-97-3 .......... 2370-88-9 ........ 2374-14-3 ........

2471-08-1 ........ 2471--09-2 ........ 2471-10-5 ........ 2471-11-6 ........ 2554-06-6 ........

2627-95-4 ........ 2652-13-3 ........

7013-67-8 ........ 9004-73-3 ........

9006--65--9 ....... 9016-00-6 ........ 18766-38-6 ...... 18772-36-6 ......

18844-04-7 ...... 18919-94-3 ......

23523-12-8 ...... 23523-14-0 ...... 23732-94-7 ......

36938-50-8 ......

36938-52-0 ......

63148-62-9 ...... 67762-90-7 ...... 67762-94-1 ......

68037-59-2 ...... 68037-74-1 ...... 68083-14-7 ......

69430-24-6 ......

not available ..... not available ..... not available ..... not available ..... not available ..... not available .....

not available ..... not available ..... not available .....

1,2-Ethanedlyltetralds(2-chloro-l-methytethytene) phosphate .....................................................

2.2-Bis(chloromethy)- 1,3-propanedlytetralds(2-chloroethyl) phosphate .....................................

Oxydl-2,1-ethanedyftetralds(2-chlomethy4) phosphate ................................................................

2-Chloro-1-methylethybls(2-choropropyl) phosphate.

Hexam ethyldislloxane .............................................................................................................

Tetradecam ethylcycloheptasiloxane .............................................................................................

O ctam ethyttslloxane ...................................................................................................................

Tetradecam ethylhexasiloxane ................................................................................ ...............

Tetracosam ethyundecasloxane ..................................................................................................

Decam ethyttetrasiloxane .......................................................................................................

Dodecam ethylpentaslloxane .........................................................................................................

Dodecam ethylcyclohexasloxane ..................................................................................................

Hexadecam ethylheptasloxane .....................................................................................................

Decam ethylcyclopentasloxane ....................................................................................................

Hexamethylcyclotdslloxane .........................................

O ctaphenylcyclotetraslloxane ......................................................................................................

Octam ethylcyclotetraslloxane .......................................................................................................

Hexadecam ethylcyclooctasloxane ...............................................................................................

Octadocamethyloctaslloxane ........................................................................................................

Docosam ethyldecasloxane ..........................................................................................................

Octadecamethylcyclononasiloxane ................................................................................... .

Hexam ethyldisllazane ...................................................................................................................

Tetram ethylcyclotetrasiloxane ......................................................................................................

Trlfluoropropylm ethylcyclotrlslloxane ............................................................................................

Hexacosamethyk lodecasloxane ..................................................................................................

O ctacosanethytidecasIfoxane ..................................................................................................

Tdacontam ethyttetradecaslloxane ................................................................................................

Dotriacontamethylpentadecasloxane ...........................................................................................

M ethyllnylcyclosiloxane ........................................................................................................

Tetram ethytdivlnyidisiloxane ............ * ...........................................................................................

Elcosamthylnonasloxane ............ ................................ . . . . . . .................

Non-end-blocked slioxanes ..........................................................................................................

M ethylpolysiloxane .................................................................................................................

Dim ethicone ..................................................................................................................................

Polydim ethylslloxane ....................................................................................................................

Docosam ethylcycloundecasiloxane ..............................................................................................

Elcosamethylcyclodecaslioxane ...................................................................................................

Hexatrlacontamethylheptadecaslloxane .......................................................................................

Tetracosamethylcydododecasloxane ..........................................................................................

Trtacontamethytcyctopentadecaslloxane................. Hexatrlacontametiiylcyclooctdecasloxane H dacontam ethyyc octadecas loxane . ................................................................................... ........................

Hexacosam ethylcyclot decaslloxane ...........................................................................................

Tetratriacontamethyl hexadecaslioxane .......................................................................................

Octatriacontam ethyl octadecasloxane ................................. ................................................

Dim ethyl silicones and slioxanes .................................................................................................

Dimethyl silicones and slloxane, reaction products with silica .....................................................

Dkmethylmethylvlnylslloxane .........................................................................................................

Dim ethylhydropolylslloxane ........................................................................................................

Dlm ethyipolysl oxanes .................................................................................................................. Dlmethyldiphenylslloxane .............................................................................................................

Cyclopolydlm ethylslloxane ........................................................................................................... Tetracontarnethylnonadecasloxane....................................

O ctacosam ethvlcvclotetradecasloxane ........................................................................................

Dotetracontamethylelcosaslloxane

Tatracontanmnhvlcvcloekosasloxane

Octatriacontamethy y.ononadecas oxane .. ................

Tctratriacontamethylcyclohptadecasfloxane .............................

DotaconWtamethylcyclohexadecasiloxane .............................

Polymethyloctadecylslloxane ........................................................................................................

Dlmethylmethyltdfluoropropytslloxane ..........................................................................................

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Federal Register / Vol. 58, No. 92 / Friday, May 14, 1993 / Rules and Regulations 28515

PART 716--AMENDED]

2. In part 716:

a. The authority citation for part 716 continues to read as follows:

Authority: 15 U.S.C. 2607(d).

b. Section 716.120 is amended by revising the entry for 1,2-benzenediamine, 5-chloro-3-nitro- under the

phenylenediamines category under paragraph (c), revising the entry for phosphoric acid, dibutyl ester under the alkyl

phosphates category, and adding two categories alphabetically to paragraph (d) to read as follows:

1716.120 Substances and listed mixtures to which this subpart applies. • • * * *t

(c)* * •

Category CAS No. Special Exemptions Effective date Sunset date

Phenylenediamines

(Benzenediamines) * a

1,2-Benzenedlamlne, 5-chloro-3-

nitro- ......................................... 42389-30-0 4/29/83 12/29/88

(d) * * *

Category CAS No. Special Exemptions Effective date Sunset date

Aq4 phosphates

Phosphoric acid, dibutyl ester ..... 107-66-4 10/29/90 10/29/00

Chloroalkyl phosphates 2.2-Bis(chloromethyl)-1,3- propanedlyltetrads(2.

chloroethy) phosphate ............ 38051-10-4 6/14/93 6/14/03

2-Chloro-1-methylethylbls(2-

chloropropyl) phosphate .......... 76649-15-5 6/14/93 6/14/03

1,2-Ethanedlyl tetrads(2-chloro-1 methylethylene) phosphate ..... 34621-99-3 6/14/93 6/14/03

Oxydl-2,1-ethanedlyttetrakls(2- chloroethyl) phosphate ............ 53461-82-8 6/14/93 6/14/03

*• • * • •

Siloxanes

Cyclopolydimethylsiloxane .......... 69430-24-6 6/14/93 /14/03

Decamethylcyclopentasiloxane ... 541-02-6 614/93 6/14/03

Decamethyltetraslloxane ............. 141-62-8 6/14/93 6/14/03

Dimethcone ................................ 9006-65-9 6/14/93 614/03

Dimethyldiphenylsiloxane ............ 68083-14-7 6/14/93 6/14/03

Dimethylhydropolylsiloxane ......... 68037-59-2 6/14/93 6/14/03

Dimethylmethylvinylsiloxane ....... 67762-94-1 6/14/93 6/14/03

Dlnethylpolyslloxanes ................. 68037-74-1 6/14/93 6/14/03

Dimethylmethyltdfluoro propylsiloxane .......................... not available 6/14/93 6/14/03

Dimethyl silicones and slloxanas 63148-62-9 6/14/93 6/14/03

Dimethyl silicones and siloxane,-

reaction products with silica .... 67762-90-7 6/14/93 6/14/03

Docosamethylcycloun decasiloxane ............................ 18766-38-6 6/14/93 6/14/03

DocosamethykJecasiloxane ......... 556-70-7 6/14/93 6/14/03

Dodecamethylcyclohexasiloxane 540-97-6 6/14/93 6/14/03

Dodecamethylpentasiloxane ....... 141-63-9 6/14/93 6/14/03

Dotetracontamethylelcosasl- loxane ..................................... not available 6/14/93 6/14/03
28516 Federal Register / Vol. 58, No. 92 / Friday, May 14, 1993 / Rules and Regulations

Category

Dotriacontamethylcyclohexadecasiloxane ............................

Dotrlacontamethylpentadecasiloxane ............................

Eicosamethylcyclodecasiloxane ..

Eicosamethylnonasiloxane ..........

Hexacosamdthylcyclotridecaslioxane ............................

Hexacosamethyldodecaslloxane.

Hexadecamethylcyclooctasloxane ........................................

Hexadecamethylheptaslloxane ...

Hexamethylcyclotdsiloxane .........

Hexamethyldisilazane .................

Hexamethyldisiloxane .................

Hexatriacontamethylcyclooctadecasiloxane ............................

Hexatrdacontamethylheptadecasiloxane ............................

Methylpolyslloxane ......................

Methylvinylcyclosiloxane .............

Non-end-blocked siloxanes .........

Octacosamethylcyclotetradecasiloxane ............................

Octacosamethyltrldecasiloxane ...

Octadecamethylcyclononasiloxane ....................................

Octadecamethyloctasiloxane ......

Octamethyltrlsiloxane ..................

Octaphenylcyclotetrasiloxane ......

Octatdacontamethylcyclonona-.

decasiloxane ............................

Octatriacontamethyloctadecasiloxane ............................

Polymethylsiloxane .....................

Polymethyloctadecylsiloxane ......

Tetracontamenthylcycloeicosaslloxane .................

Tetracontamethylnonadecasiloxane ....................

Tetracosamethylcyclododecasiloxane ............................

Tetracosamethylundecasiloxane

Tetradecamethylcycloheptasiloxane ........

Tetradecamethylhexasiloxane .....

Tetramethylcyclotetrasiloxane .....

Tetramethydivlnyldlsiloxane.

Tetratriacontamethylcycloheptadecasiloxane

Tetratriacontamethylhexadecasiloxane ............................

Triacontamethylcyclopentadecasiloxane ............................

Triacontamethyltetradecasiloxane

Trifluoropropylmethylcyclotrisiloxane ........................

CAS No. Special Exemptions

not available

2471-11-6

18772-36-6

2652-13-3

23732-94-7

2471-08-1

556-68-3

541-01-5

541-05-9

999-97-3

107-46-0

23523-12-8

18844-04-7

9004-73-3

2554-06-5

7013-67-8

not available

2471-09-2

556-71-8

556-69-4

107-51-7

546-56-5

not available

36938-52-0

9016-00-6

not available

not available

not available

18919-94-3

107-53-9

107-50-6

107-52-8

2370-88-9

2627-95-4

not available

36938-50-8

23523-14-0

2471-10-5

2374-14-3

[FIR Doc. 93-11391; Filed 5-13-93; 8:45 am]

BILUNG CODE 65604-

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