Ordering & Pricing Information

		Analyzed Quantitative Unknowns

Quantitative Unknowns

A wide variety of readily available Thorn Smith Quantitative Unknowns include:

Gravimetric unknowns such as Soluble Chloride, Soluble Sulfate, Ferrous Ammonium Sulfate

Oxidimetric unknowns such as Soluble Oxalate, Arsenious Acid, and Ferrous Ammonium Sulfate

Acidimetric unknowns such as Acid Potassium Phthalate and Soda Ash

Complexometric unknowns such as Copper Oxide (particularly recommended), Calcium Carbonate and Magnesium Sulfate

Other unknowns such as Brass, Steel, Silver Alloys and numerous others.

Varieties of Student Quantitative Unknowns (Series)

What Is A Series?

Most batches of active materials are divided into as many as 25 lots. These lots are then carefully measured and portioned with the differing percents of inactive ingredients. This procedure is what is referred to as a series of student unknowns. For example, iron oxide is produced in a series of 25 unknowns with each lot carefully prepared, analyzed, recorded and then inventoried.

Filling Orders For Series

It is our policy to send one of each series when filling your order. If you order 18 student unknowns of iron oxide, you should receive 18 varieties depending on availability and balancing of our inventories. At certain times we may even have more (sometimes we may have more; sometimes less) than the 25 listed varieties, due to residual inventories from previous series after a new series is produced. In these cases, if you should order 33 iron oxide student unknowns, it is conceivable that you will receive 33 varieties without duplicates. This kind of service to you is automatic without your need of requesting it. In any case, please call to verify quantities.

Lot Specifications

Our standard practice is to provide a variety of percentages when filling unknown orders. When the requester places an order, we automatically send a variety of lots. We do not duplicate lots unless it is specifically requested by the buyer, or availability is such that we cannot give all separate lots.

When the requester asks for specific lots it depletes our inventory unevenly. We can accomodate requested lots only if they are available. There is a Lot Specification Charge added to each order for each lot being requested. This charge is $2.00 per lot specified.

Catalog Number Number of Lots Available (Approx.) Material
MSDS INFO Unit Price

(Please verify availability before ordering specific lot numbers) Qty Student Vial Qty 100 gram Ext.

Acid potassium phthalate (see Potassium biphthalate)

80-1010 4 Aluminum-magnesium alloy for Al, Mg (also known as Dow Metal) $  2.99 $ 21.50

80-1020 3 Aluminum-zinc alloy for Al, Zn $  2.99 $ 21.50

80-1045 26 Antimony ore for Sb $  2.20 $ 16.25

80-1055 20 Arsenic
Highly toxic; shipped in Poison Packs* $  1.99 $ 14.25

80-1070 11 Brass "A" for Sn, Pb, Cu, Zn $  3.10 $ 22.25

80-1080 1 Brass "B" for Sn, Cu, Zn $  2.85 $ 20.50

80-1085 1 Brass "C" for Cu, Pb, Zn $  2.85 $ 20.50

80-1090 1 Brass "D" for Cu, Zn $  2.85 $ 20.50

80-1115 25 Calcium carbonate for CaO $  2.75 $ 20.25

80-1135 8 Cast iron for P, Mn, S, Si, C (total and graphitic) $  2.85 $ 20.50

80-1150 8 Cement for SiO₂, Fe₂O₃, Al₂O₃, CaO, MgO, SO₃, loss on ignition $  2.85 $ 20.50

80-1175 24 Chromium ore for Cr $  2.70 $ 19.75

80-1200 13 Copper ore for Cu $  2.15 $ 15.50

80-1230 25 Copper oxide (easily soluble in acid) for Cu $  2.30 $ 17.30

80-1260 25 Ferrous ammonium sulfate for Fe $  3.85 $ 25.75

80-1275 11 Iron ore (natural) for Fe $  2.60 $ 18.50

80-1300 20 Iron oxide for Fe (easily soluble in acid) $  2.60 $ 19.75

80-1320 15 Limestone for CaO, MgO, SiO₂, R₂O₃ $  2.85 $ 20.50

80-1355 10 Magnesium sulfate for MgO $  2.05 $ 15.25

80-1370 22 Manganese ore for Mn and O $  2.10 $ 15.25

80-1375 2 Monel metal for Si, Cu, Ni $  3.40 $ 24.75

80-1385 6 Nickel silver for Cu, Ni, Zn (also known as German Silver) $  3.40 $ 24.75

80-1395 10 Nickel oxide for Ni $  2.95 $ 21.50

80-1425 25 Phosphate rock for P₂O₅ $  2.20 $ 16.25

80-1475 25 Potassium biphthalate for acidity $  3.85 $ 25.75

80-1485 1 Silver alloy "E" for Ag, Cu, Zn and Ni $  9.20 N/A

80-1487 3 Silver alloy GL for Ag only (10 to 30% Ag) $  4.65 N/A

80-1488 2 Silver alloy GM for Ag only (50 to 60% Ag) $  6.75 N/A

80-1489 1 Silver alloy GH for Ag only (85 to 95% Ag) $  9.75 N/A

80-1510 25 Soda ash for Na₂CO₃ $  3.15 $ 22.95

80-1545 15 Soluble antimony (Tartar Emetic) for Sb $  2.05 $ 15.25

80-1575 24 Soluble chloride for Cl $  2.70 $ 20.75

80-1600 25 Soluble oxalate for Na₂C₂O₄ $  2.50 $ 18.00

80-1650 20 Soluble phosphate for P₂O₅ $  2.70 $ 19.50

80-1675 17 Soluble sulfate for SO₃ $  3.10 $ 21.75

80-1680 3 Steel "A" for C, Mn, P, S, Si $  2.60 $ 18.50

80-1685 1 Steel "G" Stainless for Ni, Cr, Si $  2.85 $ 20.50

80-1700 5 Steel "H" for C, Mn, P, S, Si, Ni, Mo $  2.90 $ 21.50

80-1715 25 Zinc ore for Zn $  2.50 $ 18.00

*Shipped in Poison Packs at extra charge; N/A signifies No Longer Available. Sub-Total $

Table of Contents Ordering and Pricing Information

Thorn Smith Laboratories | 7755 Narrow Gauge Road | Beulah, MI 49617
Call: 231-882-4672, 231-882-7251, or Fax: 231-882-4804
Email: Auric@ThornSmithLabs.com

Catalog Number	Number of Lots Available (Approx.)	Material MSDS INFO	Unit Price
(Please verify availability before ordering specific lot numbers)			Qty	Student Vial	Qty	100 gram	Ext.
		Acid potassium phthalate (see Potassium biphthalate)
80-1010	4	Aluminum-magnesium alloy for Al, Mg (also known as Dow Metal)		$ 2.99		$ 21.50
80-1020	3	Aluminum-zinc alloy for Al, Zn		$ 2.99		$ 21.50
80-1045	26	Antimony ore for Sb		$ 2.20		$ 16.25
80-1055	20	Arsenic Highly toxic; shipped in Poison Packs*		$ 1.99		$ 14.25
80-1070	11	Brass "A" for Sn, Pb, Cu, Zn		$ 3.10		$ 22.25
80-1080	1	Brass "B" for Sn, Cu, Zn		$ 2.85		$ 20.50
80-1085	1	Brass "C" for Cu, Pb, Zn		$ 2.85		$ 20.50
80-1090	1	Brass "D" for Cu, Zn		$ 2.85		$ 20.50
80-1115	25	Calcium carbonate for CaO		$ 2.75		$ 20.25
80-1135	8	Cast iron for P, Mn, S, Si, C (total and graphitic)		$ 2.85		$ 20.50
80-1150	8	Cement for SiO₂, Fe₂O₃, Al₂O₃, CaO, MgO, SO₃, loss on ignition		$ 2.85		$ 20.50
80-1175	24	Chromium ore for Cr		$ 2.70		$ 19.75
80-1200	13	Copper ore for Cu		$ 2.15		$ 15.50
80-1230	25	Copper oxide (easily soluble in acid) for Cu		$ 2.30		$ 17.30
80-1260	25	Ferrous ammonium sulfate for Fe		$ 3.85		$ 25.75
80-1275	11	Iron ore (natural) for Fe		$ 2.60		$ 18.50
80-1300	20	Iron oxide for Fe (easily soluble in acid)		$ 2.60		$ 19.75
80-1320	15	Limestone for CaO, MgO, SiO₂, R₂O₃		$ 2.85		$ 20.50
80-1355	10	Magnesium sulfate for MgO		$ 2.05		$ 15.25
80-1370	22	Manganese ore for Mn and O		$ 2.10		$ 15.25
80-1375	2	Monel metal for Si, Cu, Ni		$ 3.40		$ 24.75
80-1385	6	Nickel silver for Cu, Ni, Zn (also known as German Silver)		$ 3.40		$ 24.75
80-1395	10	Nickel oxide for Ni		$ 2.95		$ 21.50
80-1425	25	Phosphate rock for P₂O₅		$ 2.20		$ 16.25
80-1475	25	Potassium biphthalate for acidity		$ 3.85		$ 25.75
80-1485	1	Silver alloy "E" for Ag, Cu, Zn and Ni		$ 9.20		N/A
80-1487	3	Silver alloy GL for Ag only (10 to 30% Ag)		$ 4.65		N/A
80-1488	2	Silver alloy GM for Ag only (50 to 60% Ag)		$ 6.75		N/A
80-1489	1	Silver alloy GH for Ag only (85 to 95% Ag)		$ 9.75		N/A
80-1510	25	Soda ash for Na₂CO₃		$ 3.15		$ 22.95
80-1545	15	Soluble antimony (Tartar Emetic) for Sb		$ 2.05		$ 15.25
80-1575	24	Soluble chloride for Cl		$ 2.70		$ 20.75
80-1600	25	Soluble oxalate for Na₂C₂O₄		$ 2.50		$ 18.00
80-1650	20	Soluble phosphate for P₂O₅		$ 2.70		$ 19.50
80-1675	17	Soluble sulfate for SO₃		$ 3.10		$ 21.75
80-1680	3	Steel "A" for C, Mn, P, S, Si		$ 2.60		$ 18.50
80-1685	1	Steel "G" Stainless for Ni, Cr, Si		$ 2.85		$ 20.50
80-1700	5	Steel "H" for C, Mn, P, S, Si, Ni, Mo		$ 2.90		$ 21.50
80-1715	25	Zinc ore for Zn		$ 2.50		$ 18.00
Shipped in Poison Packs* at extra charge; N/A signifies No Longer Available.			Sub-Total $

Table of Contents	Ordering and Pricing Information
Thorn Smith Laboratories \| 7755 Narrow Gauge Road \| Beulah, MI 49617 Call: 231-882-4672, 231-882-7251, or Fax: 231-882-4804 Email: Auric@ThornSmithLabs.com